Dr. Mark Leondires, United States
     
4.6
Consultations 53
Reproductive Medicine
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Doctor Introduction

Dr. Mark Leondires, United States


Mark P. Leondires, MD, is the founder and medical director of Illume Fertility and a gay father-to-be. He is board-certified in obstetrics and gynecology and reproductive endocrinology and infertility.

Dr. Leondires currently serves on the RESOLVE Physician Council, ASRM's Diversity, Equity, and Inclusion Task Force, and the board of The Nest Egg Foundation, which provides grants to fertility patients. He is also a former chair of the ASRM LGBTQ Special Interest Group.

Dr. Leondires is also the author of Building Your Family: The Complete Guide to Donor Conception, the first comprehensive guide to both the medical and emotional aspects of becoming a parent through donor conception.


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Location and Hours
761 Main Ave #200, Norwalk, CT 06851, United States
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  • Monday

    07: 00 - 15: 00

  • Tuesday

    07: 00 - 15: 00

  • Wednesday

    07: 00 - 15: 00

  • Thursday

    07: 00 - 15: 00

  • Friday

    07: 00 - 15: 00

  • Saturday

    Closed

  • Sunday

    Closed

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    Featured Reviews
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    Feb 4, 2025
    Because the only movies we trust with fewer than 5 stars are Hallmark movies, I am giving Illume 5 stars—although my actual rating is four stars. Dr. Williams earns a full 5 for his consistent persistence, attentiveness, and calm demeanor. I was surprised that after our success, I never heard from him again and instead received separate messages from others. I would give the rest of the team and the overall process a 3. There were inconsistencies between the materials provided and the information shared, repeated lack of response from my assigned billing representative, and other minor issues that, if addressed, could elevate their service from average to excellent.
    Feb 1, 2025
    Jan 24, 2025
    Great organization with very effective communication. The location is very new and clean, the people are friendly, and I trust their care. I am grateful I chose them for our fertility journey!
    Jan 22, 2025
    I would never use this clinic. They seem caring at first, but they actually care only about your money! I paid $200 on December 17, 2024, for an egg-freezing consultation. I attended the consultation on January 8, 2025. The doctor was very informative and patiently answered my questions, so there was no issue there. But I still have not received a price quote for freezing my eggs! After the consultation, I was taken to another room to speak further with a team lead. I am not sure who she was, but I thought I would receive pricing then. They said they do not provide pricing at the consultation, but the financial representative, Suzanna, would contact me to discuss it. I found this strange because I also work in medicine, and my office would never operate this way. I assumed this was simply their business process and that someone would reach out. She never contacted me, so I emailed her. She returned my call that day and said she would email me the financial terms. She never did. I then sent two follow-up emails, and by the third email I was becoming upset. Instead of receiving a response that day, I received another bill charging me $200 again for the consultation I had already paid for on December 17, 2025. At this point, two weeks later, I still have no financial information and have been charged twice for the consultation. I was strongly considering this clinic for my fertility needs, but after seeing how it operates, I would never trust it during such a sensitive time in my life! At the consultation, they were quick to ask me to schedule every appointment immediately, but they were unwilling to provide the pricing I was promised! It feels as though they take advantage of women's emotional state. This is not a clinic I would recommend to anyone in my life. I have since had two other consultations and will choose another clinic where I had a better experience and did not feel like merely a dollar sign.
    Dec 19, 2024
    This was absolutely our worst experience with a clinic. I am posting this only after we had our daughter. We went through our first IVF cycle with them, and all they seemed to want was blood work and tests. Nearly every visit felt like they were simply exhausting our insurance benefits. It was insulting that we asked to see their only Spanish-speaking specialist, but they provided only a nurse practitioner who did not speak Spanish. We did become pregnant, but we lost our first baby because they insisted that my wife continue medication that should have been stopped after pregnancy. When we raised this, they ignored us. I know outcomes vary, but I strongly recommend going elsewhere, such as Dr. Levi in Shelton. I would not recommend them to my worst enemy.
    Feb 11, 2025
    They made a difficult process easier.
    Feb 18, 2025
    Feb 18, 2025
    Extremely helpful with everything! Nora was my nurse, and she was very reassuring and caring!
    Feb 18, 2025
    Feb 17, 2025
    Feb 22, 2025
    Feb 22, 2025
    We drove from Philadelphia for our appointment and still give 5 stars. Clean facility and lovely people. In a commercially driven environment, it is nice to find people who seem more invested in growing families than collecting fees. Thank you, Illume.
    Mar 1, 2025
    Excellent professional service
    Jun 16, 2025
    A truly compassionate, patient, supportive, and inclusive fertility clinic—the kind we never imagined before coming to Illume, our third clinic. They simplify the burdensome parts of the process, including insurance and donor paperwork, as much as possible. Everyone we encountered, from doctors and nurses to the integrative wellness team, phlebotomists, and administrators, was wonderful. Even when we felt hopeless, they never gave up. It is worth the long trip, especially for LGBTQ people!
    Jun 12, 2025
    I am deeply grateful to Illume Fertility for helping preserve my fertility during one of the hardest periods of my life. In 2022, I was diagnosed with cancer, and my OB/GYN referred me to Illume. They quickly admitted me and began the egg retrieval process. I never felt like a number; I felt cared for, heard, and supported throughout. Dr. Richlin was a calm and compassionate guide, and my care team, Caroline and Chelsea, were angels—kind, knowledgeable, and always prompt in addressing questions and concerns. The whole team made a frightening experience manageable and gave my husband and me real hope for the future. We are now parents to a wonderful little boy, but Illume will always hold a special place in our hearts. If you face a medical diagnosis threatening fertility, I highly recommend Illume Fertility.
    Jun 6, 2025
    Jun 6, 2025
    Jul 8, 2025
    I went to Illume after trying for 5 months at age 34. Although we ultimately conceived naturally during our first month there, I still believe they deserve credit. I previously worked at a high-end longevity clinic in New York, so my metabolic health was excellent before arriving, but I was concerned that it was taking too long. Through my own interventions, I had already increased my AMH from 1.7 to 2.36. I was healthy, had done everything possible, had regular cycles, and tracked all my information. Illume performed a saline ultrasound, paused and reset my cycle with birth control, and completed routine SA, genetic testing, and other evaluations. I believe one or two of these interventions made the difference. I loved the staff and was genuinely sad when I had to transition to my regular obstetrician. I highly recommend Dr. Williams. He provides guidance during visits, speaks very calmly, and is kind to his colleagues. My husband really liked him. We wish he could deliver our baby.
    Jul 8, 2025
    I began IVF less than a year ago. My interactions with Illume have been extremely positive, especially with Dr. Kucherov and Jamie Dobos. They have been central to my wonderful experience and consistently go above and beyond. Having them on my team made an enormous difference. Through every high and low, they always listened patiently. Dr. K is highly knowledgeable while keeping things relaxed. He can deliver bad news in a very gentle, understanding way. He is sincere and helps you through difficult moments. Jamie is amazing! Every day, she makes more effort than expected and does everything possible to make you feel heard and understood. If both are on your team, you will always be grateful.
    Jun 21, 2025
    The entire team is very friendly.
    Aug 3, 2025
    I have only positive things to say. The staff are friendly, the clinic is clean, and appointments run on time.
    Aug 2, 2025
    The ladies here are amazing and made my appointment very smooth! I definitely recommend them! I cannot wait to return for my surrogate embryo transfer!
    Jul 22, 2025
    I initially heard great things about this clinic, but the front desk may need additional training. I called twice and was told I would receive available times to reschedule my initial consultation because the doctor had canceled my first appointment. More than a week has passed, and I still have not received a response. As a new patient, it is frustrating to be told twice that someone will follow up and then hear nothing.
    Aug 28, 2025
    Aug 27, 2025
    Aug 7, 2025
    So far, Illume has been a tremendous help to my partner and me. They acted quickly to address our unexplained infertility and help us pursue our goal. They are responsive, assembled a complete care team for us, and are very thorough in ensuring everything proceeds smoothly. We are very grateful. Although we only started our first cycle this week, the process began two months ago, and we feel prepared. My only advice is to be very specific when asking questions. I initially knew little about the process, and because they explain it one step at a time, it can be confusing if you do not understand the full sequence or specific timeline. They always answer all our questions, and I am sure they work with many different kinds of patients, but someone like me needs to be proactive to ease anxiety and feel reassured. I gave four stars because the timeline confused me. I am a teacher and work far away, so my ability to visit Harrison during the school year is very limited, and I wanted to complete as much as possible over summer break. Since I begin working in Sullivan County in late August, I worried about completing everything on time and knew that fitting multiple appointments into a short period could be difficult. Everyone responded, but some information seemed to be missing. For example, when I scheduled medication delivery, there were videos but no instructions for my own regimen. The only information I received was that I would take birth control pills for at least 7 days before starting injections. It turned out there was a 3-day gap between the pills and injections, at least in my case, though no one explained that. I also had to contact them for my protocol after arranging delivery. This extra step felt unnecessary when I was already anxious about receiving a refrigerated package and watching countless instructional videos. I wish they provided a visual timeline showing the days of each cycle, even if adjustments might be needed, so I would not repeatedly panic about falling behind. Ultimately, everything worked out and the timing was right, so I think I simply did not understand the process. Thank you for all your help! I hope this cycle works :)
    Aug 29, 2025
    As a donor, I had a very positive experience at Illume in Norwalk. Their team was knowledgeable, welcoming, and always ready to help. They truly went above and beyond. I highly recommend them!
    Sep 16, 2025
    They just want your money, they don’t care about helping you figure out what’s wrong. It’s IVF or they don’t care and they’ll refer you out before your partner is even examined. They have someone who’s supposed to help you “financially plan” but they just explain your health insurance plan and then never get back to you. They didn’t even give an estimate for a procedure that had an original cost of over $1,300 but was still $858 after insurance.
    Sep 24, 2025
    Excellent staff and service!
    Sep 24, 2025
    Sep 24, 2025
    Great experience! They always make you feel welcome!
    Oct 23, 2025
    I cannot say enough good things about Dr. Kucherov and especially nurse Jocelyn Crespo. From the moment I met them, I felt valued, heard, and cared for—not only as a patient, but as a person navigating an unimaginably emotional and vulnerable journey. Jocelyn is everything one could hope for in a fertility nurse and more. She is exceptional, attentive, kind, and compassionate in every interaction. She is diligent and organized, and every question is answered. She follows up promptly, ensuring you remain informed and supported at each stage. Often, she answers questions before you even contact her. Her empathy and dedication are invaluable during such a private and uncertain experience. Jocelyn truly treats you like her only patient, and that level of attention is rare. Dr. Kucherov is equally admirable. He is brilliant, approachable, and genuinely committed to his patients. He explains everything patiently and thoroughly, never makes you feel rushed, and combines deep medical expertise with sincere care. His calm, confident, warm approach immediately puts you at ease, and you can tell he truly cares about your outcome. He is not only a doctor, but a partner throughout the journey. As a physician who owns a large medical practice, I understand how difficult it is to balance modern medicine’s clinical demands with compassionate care. I know the challenges of managing staff, adapting to changing insurance policies, and maintaining quality and empathy under pressure. Illume Fertility, particularly this team, excels in every area. Their attention to detail, proactive communication, and patient-centered philosophy are what every medical practice should strive for. In a healthcare system that can feel impersonal, these two professionals demonstrate empathy, professionalism, and genuine partnership. I sincerely thank Jocelyn and Dr. Kucherov for their kindness, integrity, and dedication. They set an exceptionally high standard for care. If you are beginning or continuing a fertility journey, I wholeheartedly recommend them. You will receive expert care from professionals who are not only highly skilled, but genuinely care about you.
    Oct 20, 2025
    Oct 20, 2025
    Oct 20, 2025
    Oct 20, 2025
    Nov 7, 2025
    The patient coordinator is consistently unable to answer urgent IVF questions.
    Nov 7, 2025
    My IVF journey is just beginning, but after four recurrent pregnancy losses (RPL), finding Illume has been a blessing. From the front desk and scheduling team to my dedicated patient navigator, everyone I have encountered has been kind, patient, and helpful. My nurse Kathy has been my anchor. She always returns calls promptly, patiently answers every question, and makes me feel genuinely cared for. And Dr. Hurwitz…words cannot express my gratitude. He is direct, knowledgeable, and honest, yet warm, considerate, and reassuring. He explains everything clearly and always makes me feel safe and supported. Time will tell where this journey leads, but knowing I have such an excellent team beside me brings tremendous peace of mind. Thank you, Illume.
    Nov 7, 2025
    Nov 7, 2025
    Friendly staff and attentive service.
    Nov 7, 2025
    Dec 11, 2025
    Dec 11, 2025
    Nov 29, 2025
    The doctors, nurses, and all staff at the Trumbull and Norwalk offices are wonderful. They are kind, caring, and responsive. I called outside regular business hours several times and always received a response within minutes. Everyone was helpful and supportive. I recommend Illume every day!
    Nov 26, 2025
    Jan 17, 2026
    The staff were very friendly and made me feel welcome. I did not have to wait to be called, and I finished my appointment earlier than expected. The entire process was efficient and smooth.
    Jan 17, 2026
    The nurses, doctors, insurance and billing specialists, and entire staff at Illume are wonderful. The process can be complicated, but they are happy to explain it, help you navigate it, and support you throughout. I am truly grateful.
    Feb 13, 2026
    Everyone was wonderful. I received help and care quickly, and everyone was attentive and kind. I am glad to use this medical facility.
    Jan 31, 2026
    Illume Trumbull provided excellent service from the start, so I expected the same care when I went to Illume Norwalk for egg retrieval. Unfortunately, that was not the case. After the procedure, I developed mild to severe ovarian hyperstimulation syndrome (OHSS). A Norwalk doctor called but seemed to think I was overreacting. When I needed IV fluids for severe dehydration, he said my veins were difficult and told me to drink Gatorade. I had to plead before they finally gave me fluids. A wonderful nurse administered the IV, but I felt I would have been better off going to the ER than trusting Norwalk. The two stars are entirely for that excellent nurse.
    Mar 27, 2026
    Mar 18, 2026
    I sincerely thank the Illume Fertility team for their attentive care and support throughout my fertility journey. 🤰💝 Special thanks to Dr. Cynthia Murdorck and nurses Cristina and Danna—they were truly wonderful. They were always kind, patient, and professional and made me feel supported and cared for at every step. I also thank the entire team. Everyone I met was friendly, welcoming, and dedicated. Access to support in Portuguese was essential for me and helped me feel more comfortable and understood throughout the process. I am deeply grateful for their dedication, compassion, and care. I highly recommend them!
    Mar 3, 2026
    I went to the Norwalk clinic to submit simple test results and was told it would take about 5–7 days. It took 15 days because neither my doctor nor I could reach the clinic staff. When we finally did, they said, “Sorry, we forgot to fax it.” Two more days passed and it still had not been faxed. This is the most unprofessional team I have encountered.
    Apr 17, 2026
    I do not recommend donating here because they misrepresent the compensation and are difficult to communicate with. Other agencies are much more professional.
    May 2, 2026
    Illume is a warm, welcoming, and encouraging place where I felt supported throughout my fertility journey. Dr. Richlin and nurse Maureen provided a very thorough consultation, answered all our questions, and always remained positive. I looked forward to every appointment because I knew I was one step closer to my dream of pregnancy. I am delighted to share that after my first transfer, I am now 13 weeks pregnant with a healthy baby girl! Thank you to every member of the Illume team. We will be back :)
    Jun 4, 2026
    Jun 4, 2026
    太棒了，我喜欢😘
    Jun 4, 2026
    迈耶医生和全体工作人员都太棒了，太友善了！我永远感激他们每一个人❤️
    Jun 1, 2026
    Dec 12, 2024
    Oct 19, 2024
    Oct 17, 2024
    We had a wonderful experience at Illume Fertility while building our family. From the moment we entered, the entire team made us feel welcome and supported. They truly understood the emotional journey of fertility treatment and provided compassionate care at every step. One of the best aspects was how they respected our time and work-life balance. Our visits were efficient, and we were always in and out without feeling rushed. This made managing appointments around busy work schedules much easier! The staff were knowledgeable and patiently answered all our questions while guiding us through the process. We felt well informed and confident in our treatment plan. We highly recommend Illume Fertility to anyone considering fertility treatment or simply seeking information before beginning this journey. They made a challenging period in our lives more manageable and positive. Thank you for being such an important part of our path to parenthood! We will always be grateful!
    Sep 20, 2024
    I cannot say enough good things about the front-desk staff, nurses, and doctors. Everyone made our process very smooth. They were helpful, and their manner put my husband and me at ease. I am now entering my second trimester, and I know we would not be in this place of gratitude without everything they did for us. I never had to worry or felt confused. Communication was always a priority, and we were never left uninformed. In just a few months, thanks to them, we will experience the brightest light! Thank you for all your hard work; we feel fortunate to have experienced it firsthand!
    Sep 1, 2024
    Excellent doctors and nurses. My experience with them was the best.
    Feb 22, 2025
    Illume Fertility has the best service!
    Jul 8, 2025
    The doctors, nurses, and staff are professional, caring, friendly, and efficient. My doctor, nurse, patient adviser, and insurance specialist all gave me tremendous support. I felt I could always reach the clinic and received quick responses, even on weekends or outside business hours.
    Jun 6, 2025
    A very efficient and lovely team cared for me.
    May 3, 2025
    Apr 24, 2025
    I cannot say enough wonderful things about this company and the local team! I also had the privilege of working with the Trumbull office, and the care and compassion never changed. Everyone here is incredibly supportive, and their approach to this very sensitive journey is unmatched. Wherever you are in learning about your fertility journey, let them help. They truly are there for you ❤
    Mar 22, 2025
    Honestly, the entire process was very simple. However, I think they should stay in closer contact with clients instead of leaving them on their own.
    Aug 27, 2025
    An excellent team—everyone is very professional and friendly.
    Aug 9, 2025
    Sep 24, 2025
    Learning how my body works and what it is capable of has been a difficult journey. Illume gave me hope that I could build a family with my partner.
    Sep 24, 2025
    Illume Fertility is an outstanding clinic. The staff, support system, and everyone involved are wonderful.
    Oct 20, 2025
    I transferred to Illume in May and wish I had done so sooner. Illume was the clinic originally recommended to me, and the timing was finally right. The staff is wonderful and very professional. My anxiety has eased considerably since transferring. I highly recommend them!
    Nov 10, 2025
    A pleasant experience every time! Every staff member is friendly, and appointments run on time.
    Nov 7, 2025
    Nov 7, 2025
    Dec 5, 2025
    I recently had my first fertility consultation at Illume in Stamford. We arrived about five minutes after our 8:30 a.m. appointment, but staff immediately asked why we were ‘so late’ and said the visit had to be rushed because another patient was scheduled at 9:30. As a new patient, this felt uncomfortable. I understood that they were out of network, but communication about testing was poor. I gave a urine sample assuming it was a routine pregnancy test and later learned it was for gonorrhea and chlamydia; no one explained it or requested consent. No one said laboratory testing required fasting. The office appeared friendly and organized, but the experience felt efficient yet impersonal and opaque. Fertility care deserves clearer communication and more thoughtful attention.
    Jan 31, 2026
    My experience at this fertility clinic was very disappointing. They never disclosed the true costs in a timely manner and repeatedly told me treatment would be covered by insurance, which turned out not to be true. This caused major financial stress and delays. The doctor also seemed very disorganized and did not clearly explain my diagnosis, treatment plan, or why there were such long waits between steps. I often felt confused and uninformed about my own care. I also had a uterine polyp removed at this clinic, but it returned within six months, making me question whether the procedure was performed properly. Overall, I did not feel supported, adequately informed, or confident in the care I received.
    Jan 17, 2026
    How can I express my gratitude to this team? My experience has been wonderful ever since I came to illume to see Dr. Ressler. Every staff member has been helpful and knowledgeable at every stage. I initially consulted Dr. Ressler about fertility treatment, but ultimately conceived naturally. Whenever I saw the team, they greeted me with smiles, scheduled appointments around my availability, and promptly answered my questions. I wish I could stay with the clinic longer than 8-9 weeks, but their process is to transfer me to my OB-GYN at 10 weeks. Once again, thank you to everyone—Chelsea, Briggette, Thelma, Dr. Ressler, and all those who helped me in any way. I simply want to say thank you!
    Feb 17, 2026
    Feb 13, 2026
    Feb 13, 2026
    They do not care at all!
    May 2, 2026
    The healthcare staff and doctors are excellent, and I highly recommend them. The service is very good. I am extremely satisfied and grateful.
    Mar 6, 2026
    Illume fertility center is amazing.Dr Richlin and Dr. Witt are great. They explain everything in detail to you. Dr. Richlin takes his time and make everything so easy. He always listens to your concerns. He is the most amazing, intelligent doctor that I ever meet.All the stuff are great. I would like to include Sammy that she responses my email right away ad she is very helpful .
    Apr 18, 2026
    I am very satisfied with my experience at Illume. Everyone I encountered was friendly and professional, and I felt well cared for from the beginning. I worked primarily with Dr. Richlin, who was excellent and very thorough. He truly made me feel heard and took time to explain everything rather than rushing. My nurse Carmen and patient navigator Sammy were also wonderful and very helpful. Thank you to everyone at Illume!
    Jun 4, 2026
    We had a wonderful experience with this fertility clinic. The entire team was professional, responsive, and genuinely supportive throughout the process. A special thank you to Dr. Richlin and our nurse, Jamie, whose expertise and thoughtful care made us feel confident every step of the way. Thanks to the care we received here, we now have our beautiful baby girl. We are incredibly grateful and would highly recommend this clinic to anyone navigating fertility treatment. -The Pecora Family
    Jun 4, 2026
    Jun 2, 2026
    Jan 28, 2025
    Jan 24, 2025
    Excellent practice, excellent doctors, and outstanding communication. I am glad I chose this organization for our fertility journey.
    Jan 24, 2025
    Jan 24, 2025
    Dec 21, 2024
    Great experience. Kind and understanding staff. They make you feel like family. A wonderful experience!
    Feb 11, 2025
    Everyone I worked with at Illume was kind and very helpful. They guided me through the entire process and made me feel comfortable. I highly recommend Illume Fertility to anyone struggling to conceive.
    Feb 11, 2025
    This clinic is wonderful. I felt comfortable with the staff from day one. They are all helpful, informative, and kind. Through every scan and blood test, appointments were smooth and quick without feeling rushed. On egg-retrieval day, I felt calm and comfortable and trusted every staff member I encountered. My team of nurses, doctors, patient coordinators, and financial advisers was excellent. They put me at ease, answered every question, and told me exactly what I needed to know—no more and no less. This kept the IVF process from feeling overwhelming, and so far I have not felt stressed during any part of the journey. I highly recommend them to anyone; I even had my sister-in-law contact Illume. My journey is not over, but Illume has kept me hopeful.
    Feb 11, 2025
    Jun 24, 2025
    I cannot say enough good things about Illume! Every physician, nurse, phlebotomist, receptionist, and other staff member I met was kind and helpful. I worked with Dr. Hurwitz, but also met other physicians along the way. Each was friendly, made me comfortable, and was knowledgeable. The nurses and phlebotomists are simply the best. My nurse Ashley was wonderful. She answered all my questions, large and small, and showed empathy throughout. We recently returned to routine OB-GYN care, and now I miss this office at every medical appointment.
    Jun 21, 2025
    Jun 21, 2025
    If I could give Illume a million stars, I would. Although my fertility journey is not over, everything so far has been perfect. From the reception staff to my physician and everyone I have encountered, they have been friendly, supportive, encouraging, sincere, prompt, efficient, and highly responsive. Their excellent and timely communication makes the process seamless. I wish all my healthcare providers were from Illume. Do not hesitate to begin your fertility journey with Illume. Many friends strongly recommended them, and I have never regretted choosing them!
    Jun 12, 2025
    This team was very kind, prompt, and thoughtful and provided comprehensive help throughout our journey. Highly recommended!
    May 3, 2025
    The staff are very friendly and kind. The atmosphere is wonderful, warm, and comfortable. There is no better place to be during this challenging journey.
    Jul 14, 2025
    Everyone I met here was wonderful except my physician. I scheduled an ultrasound that my doctor said he wanted to perform himself, but he did not come to the appointment, so a doctor we had never met performed it instead. The new doctor did not want to discuss the results in detail because he said that was my doctor's responsibility. Fine, I understood. Several days later, I still had not heard from my doctor, so I called. When he returned my call, he was very unfriendly and berated me for wasting his time by asking questions that he said I should discuss with my husband. First, this is my body and my insurance. Second, I tell my husband everything we discuss. Third, I am also a physician—there are ways to communicate without making patients feel belittled or as though their questions do not deserve a kind, compassionate answer and explanation. I cannot imagine ordering a diagnostic test for one of my patients, failing to call for several days, and then berating them when they call for results. He could easily have said—or asked a nurse to call if he was too busy—that he wanted to schedule a consultation for us to discuss everything together. That would have been fine. Yet even years later, he has left a very negative impression. I will never return to Illume or recommend it to anyone. Beyond patient care, I called repeatedly about my account balance and repeatedly requested a receipt showing that I had paid about $1,500. I then sent another $1,800 that they said I owed. After several calls, I still could not obtain a copy of my account balance showing the payment, nor a clear answer about whether I still owed $1,800 or whether the $1,500 had been applied to that balance. Each time, I was told I owed $1,800 without any explanation of how the $1,500 had been credited. A very frustrating experience.
    Jul 9, 2025
    All I can say is that their attentiveness and kindness are first-rate. I love the team, the excellent service, and how organized they are.
    Jul 8, 2025
    Navigating the complex field of infertility is daunting, to say the least, but working with Illume has made it a positive experience. Although our journey continues, I can confidently say that Illume has outstanding staff and providers. They support you, explain things honestly and clearly, and show that they genuinely care. Their front desk staff deserve praise for always greeting you with a smile, which can truly brighten your day when you are exhausted and discouraged. I highly recommend this clinic to anyone hoping to grow their family.
    Jul 23, 2025
    If you are looking for extremely poor coordination during one of the most important times in your life, I highly recommend this place.
    Aug 9, 2025
    I have just completed diagnostic testing in my fertility journey. The front desk staff, nurses, and three doctors I met were all very knowledgeable and friendly. I had no idea what to expect. It is both exciting and worrying, but everyone made me feel comfortable and welcome. They see you promptly, which reduces anxiety, and explain every step in detail so you understand what they are doing. I am glad I chose Illume to help with my fertility journey.
    Sep 17, 2025
    Sep 24, 2025
    So far, Illume has exceeded our expectations. The staff are knowledgeable and friendly. There is always a doctor in the room at every exam, which is very reassuring and was not the case at our previous clinic. Although we are only halfway through our cycle, I am very grateful for everyone's support. My only complaint is that the waiting room is too small, but fortunately you do not have to wait there long.
    Oct 20, 2025
    I completed two IVF cycles at Illume and now have a 3-year-old and am expecting our second miracle. The staff are wonderful, and Dr. Hurwitz is the best. He is caring and understanding, and you can tell he loves helping people. I highly recommend Illume to anyone needing fertility support.
    Oct 20, 2025
    Illume Fertility helped my husband and me become pregnant after a late miscarriage and infertility. Every doctor and nurse made me feel completely at ease. I could contact them at any time, and they always responded promptly. They accommodated appointments at both the Danbury and Norwalk clinics. Everyone, from the doctors and nurses to the clinic staff, was wonderful. Highly recommended!
    Oct 20, 2025
    Oct 20, 2025
    They are always knowledgeable and courteous. I am very grateful that they made this nerve-racking journey feel less lonely!
    Nov 26, 2025
    Wonderful 👏
    Nov 19, 2025
    If I could give five stars, I would give 50,000 without hesitation! Working with Illume during the hardest period of our lives was a dream come true. We sought help after several early miscarriages. We are very grateful to our dedicated care team: Dr. Kucherov, nurse Jamie, and patient navigator Cathlyn. All three were exceptional. From our first visit, we felt supported, fully informed, and hopeful about our future. Throughout six months of treatment, Dr. Kucherov and Jamie went above and beyond and patiently answered every question. My husband and I will always be grateful for their attentive care. Although we ultimately conceived naturally, I believe it was entirely due to the treatment plan Dr. Kucherov developed for us. He is an extraordinary physician and person! We primarily visited the Danbury clinic but also went to Norwalk and Trumbull several times. From the women at reception and the phlebotomists handling morning monitoring to our excellent physician assistant Diana, who performed our ultrasounds, every staff member treated us with respect and compassion and kept us informed throughout. We also thank Dr. Leondires, who performed a necessary procedure in the Norwalk operating room. Dr. Leondires was calm and reassuring, which greatly eased our anxiety and fear that morning. Our nurse Sara and the anesthesiologist were also excellent. Everything at the clinic was clean, organized, warm, and comfortable. Words cannot express my gratitude to everyone at Illume for such a positive experience. I truly wish Dr. K and Jamie could remain with us throughout the pregnancy. We are deeply grateful and cannot wait to welcome our baby in June 2026. Thank you from the bottom of our hearts!
    Nov 7, 2025
    The team is organized, compassionate, and communicative. I felt fully supported and informed throughout the process!
    Nov 7, 2025
    Dec 11, 2025
    Not helpful. They do not communicate internally.
    Dec 11, 2025
    ⭐️⭐️⭐️⭐️⭐️ I would give this team even more stars if I could. From my first visit, I felt seen, supported, and surrounded by people who genuinely cared. They encouraged and comforted me when hope was low. This team does more than treat patients; they care deeply. From the administrative staff to Kathy F, Dr. A. Kuchgrove, Dr. Hurwitz, and the clinical team, everyone touched my life. They celebrated my highs, supported my lows, and made sure I never felt alone. Their dedication, compassion, and kindness gave me strength and hope when I needed it most. If you want a team that treats you with heart, respect, and consistent kindness, this is the place.
    Jan 8, 2026
    I went there for intrauterine insemination and initially felt good about the clinic. They assigned me a ‘support team’ to handle everything from finances to medical care. As treatment continued, however, I felt like livestock. They were indifferent, and I saw the doctor responsible for my care only twice, including the initial consultation. In addition, my nurse and records coordinator were absent for half of my treatment, so even though I had their direct numbers, I had to call the clinic or front desk whenever I had a question. If you are struggling with infertility as I was, and I can attest that it is extremely painful and difficult, I recommend avoiding this clinic. At first they made many confident promises, but once treatment ended, it was as though you had never been their patient.
    Jan 7, 2026
    I had done two IUIs elsewhere and came to Illume looking for personalized, empowering care. I had had a terrible experience at another practice and didn't want to sacrifice quality of care for convenience. I spent a little over a year with Illume and had a wonderful experience. I met with all the doctors, but my favorites were Cynthia Murdock and Alexander Kucherov. They all treated me like a person and not a number, recognized that IVF is a physical and emotional rollercoaster, and adapted treatment plans to my body and goals. I was always able to be accompanied by my husband and I even brought in my grandmother and my son to some appointments, which felt amazing. They were gentle, compassionate, and communicative and I am so thankful. I also really loved and appreciated seeing Black and Brown staff as a Black woman who has experienced racism and bias many times navigating the medical system. They all took such great care of me and now I am expecting my little baby girl after four years of infertility. Thank you!
    Jan 16, 2026
    Everyone, from the front desk to the doctors, was excellent. During such a vulnerable time, my husband and I always felt supported and cared for.
    Mar 3, 2026
    This place is amazing! I have seen many doctors and specialists, but none helped me the way they did. They are the kindest and most caring people!
    Feb 19, 2026
    Feb 13, 2026
    Feb 13, 2026
    My experience at Illume Fertility in Danbury, Connecticut, has been wonderful. From reception to the medical staff, everyone is welcoming, kind, and compassionate. The staff always greeted me with a smile, comforted me on my hardest days, and reassured me that everything would be all right. This meant more to me than they may realize. This is my second fertility treatment cycle. My first treatment was intrauterine insemination (IUI), which unfortunately failed. I am now undergoing IVF and am currently at the egg retrieval stage. Throughout the process, my doctor, nurses, and phlebotomists have been professional, patient, and very reassuring. IVF can be extremely stressful and emotional, but the Illume team has made me feel supported at every step. I sincerely appreciate their care and thoughtfulness.
    Mar 24, 2026
    Working with Illume Fertility was a dream experience. The doctors, nurses, and front desk staff were wonderful. With their team's help, my fertility challenges were resolved in under a year. My lifelong dream of becoming a mother is finally about to come true. I highly recommend Illume Fertility! Their kindness and professionalism truly impressed me. This is the only clinic I recommend!
    Mar 18, 2026
    I would like to express my heartfelt gratitude to the team at Illume Fertility for all the care and support throughout my journey. A special thank you to Dr. Cynthia Murdorck, nurse Cristina, and Danna — they were truly amazing. Always kind, patient, and highly professional, they made me feel supported and cared for every step of the way. I would also like to thank the entire team, Everyone I encountered was incredibly kind, welcoming, and dedicated. One of the things that made a huge difference for me was having support in Portuguese, which helped me feel more comfortable and understood during the entire process. I am very grateful for all the dedication, compassion, and care. I highly recommend them!
    May 2, 2026
    Excellent atmosphere and very good staff service. I was completely satisfied with everything.
    Jun 2, 2026
    我丈夫已经好几周试图预约了，但一直没能约上。他们说还没收到医生的转诊单，说会回电，但却杳无音信。我不知道丹伯里诊所到底出了什么问题。
    Jun 4, 2026
    Jun 1, 2026
    工作人员非常友好且专业。赫维茨医生是一位很棒的医生，非常专业，我欣赏他的一点是他会实话实说。他从不粉饰太平，这对我当时的情况很有帮助。
    Jun 1, 2026
    我们在Illume的体验非常棒！工作人员知识渊博、热情友好、沉稳冷静，这在面对不孕不育的挑战时让人倍感安心。他们沟通顺畅，并且始终确保有专人负责患者，所以即使您的团队成员无法提供服务，他们也会安排其他工作人员负责后续的问诊等事宜！
    Jul 2, 2026
    我和我丈夫无比感激库切罗夫医生及其出色的团队，是他们帮助我们实现了为人父母的梦想。 从我们第一次就诊开始，库切罗夫医生就展现出渊博的知识、专业的素养、耐心和同理心。他耐心解释了试管婴儿治疗的每一个步骤，解答了我们所有的问题，并在整个过程中始终给予我们支持和信心。 试管婴儿治疗可能是一个充满情感波动和压力的过程，但库切罗夫医生的精湛医术和真诚关怀让我们在治疗的每个阶段都充满希望。我们始终感到自己得到了最好的照顾。 如今，我们拥有了一个健康可爱的宝宝，我们将永远感激库切罗夫医生及其团队为我们家庭所做的一切。他们不仅提供了卓越的医疗服务，更帮助我们实现了人生中最伟大的梦想。 如果您正在寻找一位杰出的生育专家，我由衷地推荐库切罗夫医生。他的专业精神、和蔼可亲和敬业精神真正改变了患者的生活。 库切罗夫医生，感谢您彻底改变了我们的人生。我们永远不会忘记您的仁慈和您给予我们的悉心照料。
    Jun 30, 2026
    员工非常棒，非常友好，环境干净整洁，停车位充足，欢迎所有人。
    Dec 12, 2024
    The staff are all wonderful and helpful.
    Nov 21, 2024
    Nov 2, 2024
    Choosing Illume was the best decision for us! We came to the clinic before we were fully ready to have children, but we knew we would need IVF regardless. We decided to create and freeze our embryos while I was still young, at 29, rather than wait several more years. We were assigned to Dr. Shaun Williams. We truly enjoyed working with him, and I was always happy when he performed my monitoring. He explained everything well, including our options and the process. I had the best nurse, Linda, who was extremely helpful and kind! I could email her many questions and receive warm answers the same day. I truly appreciated it! The same was true of my patient coordinator, Katherine. Linda was out of the office during our first cycle, but another excellent nurse, Jodi, covered for her, and I will always be grateful that she guided us through that first cycle. Moving quickly was important to us, and we appreciated that Illume could accommodate us and our busy schedule. We had our first consultation in early August and began stimulation in early September as soon as all results were available. Dr. Williams left for vacation before we started, but he prepared my protocol in advance, so everything was ready. I saw other doctors at monitoring appointments, and all were excellent and answered my questions. Because we hope to have a larger family, we decided to complete another embryo-freezing cycle. So far, everything has gone as smoothly as the first time. We adjusted my protocol slightly and hope for better results! We are very grateful to work with such an excellent team and expect to return for a transfer in two or three years. After reading for weeks, I felt stressed about the process, but Illume truly made it easy and comfortable. Thank you!
    Oct 19, 2024
    I have worked with Illume for about a year and a half and had 2 unsuccessful IUIs. They have been very supportive, and I am still working with them and my team. No complaints. My team and the doctors are all wonderful, as are the other doctors, nurses, and front-desk staff I have encountered. Thank you, Illume! :)
    Aug 28, 2024
    I am dissatisfied with my experience. Dr. Williams was wonderful, and I regret that we could not continue his care because we had to move to another state. Unfortunately, I cannot say the same about the staff. My navigator was unavailable most of the time, and it took one or two weeks to reach her. After I asked about insurance coverage, it took nearly a month and several calls before anyone contacted me. I requested my records, but they said the first form I signed was “never received” and asked me to sign another. I am still waiting for the records to be sent. Because we have an appointment with our new office, I called repeatedly to follow up. The person on the phone hung up before allowing me to fully explain the situation. It was extremely frustrating. I hope future patients do not have to deal with unprofessional staff.
    Feb 23, 2025
    Feb 20, 2025
    Illume is awful; from beginning to end, you feel like nothing more than a check to them. On your first call, you are asked to choose “your doctor,” but be aware that you will almost never see that doctor. In about 20 in-person appointments, we saw the doctor twice, and both times she did not know who I was or what my plan was. Our “team” was extremely disorganized and did not communicate. We felt no support at all. I was constantly reaching out and following up on everything. Morning visits felt more like urgent care: often no seats, no privacy during such a sensitive time, appointments scheduled aloud in front of a full room, awkward encounters with people you know, and a cold, sad atmosphere every morning. Several times I also found urine samples on the bathroom sink with patient information and dates from days earlier at the Trumbull and Norwalk locations. Once medications begin, everyone knows the expense is substantial. We were repeatedly told we needed more and more. We did not ultimately need all of it and paid out of pocket for unnecessary medication because they would not listen. I suggested delaying the order in case it was not needed, but the nurse insisted. It is now unused in my refrigerator and must be discarded, but I cannot bring myself to throw away hundreds of dollars. Our egg-retrieval process was a nightmare. The operating-room staff behaved as though you were undergoing emergency surgery, rushing everything and making an already frightening, anxiety-filled experience worse. At one point, I believe we should have been asked whether to freeze some eggs or attempt fertilization. My husband had surgery too, and his sperm did not meet the standard. Instead, even after seeing this, they continued trying to fertilize all my eggs without calling us. No one asked whether we should preserve any or how we wanted to proceed. The doctor said he searched for sperm for hours, so there was time to call. A good doctor would focus on our goals. Unfortunately, the retrieval was unsuccessful, and different people gave conflicting stories for months—yes, sperm was frozen; no, it was not. It turned out we had frozen sperm for the past 10 months. Research your options. We chose this clinic because my OB-GYN recommended it. After the first few visits, I felt lost and frustrated by the communication. I wish we had left instead of continuing through the full process and retrieval. We have since found another clinic where the doctor explains everything and leaves us with no questions. Do not assume patients without medical backgrounds understand what you mean. We are still trying to obtain our records. Good luck reaching anyone or getting anything done. My husband is still awaiting a billing-department callback from August. It is tragic that a place like this can provide such poor care and such a bad experience. It makes you question whether to endure the process again when all you want is a child of your own. I hope this review encourages others to consider alternatives, or at least advocate for themselves and ask questions at every step. I wish I had, but I did not know what I needed to ask.
    Feb 18, 2025
    This is one of the best places for sperm testing; they treated me like a king.
    Jun 21, 2025
    May 20, 2025
    I had a good experience with lllume Fertility.
    Apr 9, 2025
    Attentive care from the front desk to the clinical staff! Their encouragement through some very frightening situations made the process much easier! Although the testing I underwent was highly invasive, it was handled and explained thoughtfully, and I felt cared for by every staff member each time. We were fortunate to conceive naturally, but their care did not end with conception. Although my own OB-GYN could not and would not see me before 8 weeks, Illume started early monitoring and gave my husband and me the reassurance we had sought from Illume at our initial consultation. Illume is a group of people genuinely working to make the prospect of having children later in life less frightening, and we will always be grateful.
    Apr 5, 2025
    My fiancé and I were excited to begin our journey with this clinic, but unfortunately, I cannot say they felt the same. After the initial interview, the clinic essentially disappeared. I was told that a team of people would contact me, but they did not; only my nurse did. When I contacted my nurse to ask about the next step, I was completely ignored for two full weeks. I was extremely disappointed, especially because fertility problems are already an obstacle, and receiving no support from the doctor and “team” during this already difficult journey makes you feel even worse. I had to restart my search for a reproductive endocrinologist. I hope your experience is better than mine.
    Mar 24, 2025
    Aug 3, 2025
    I can recommend the clinic; everyone is very kind. My nurse, Sarah Cannavaro, is the best. She explains every question you may have in detail. She does not speak 100% Spanish, but she tries to make you feel comfortable by explaining things in Spanish. I care for her very much. My doctor, Alexander Kucherov, is the best and always positive about any diagnosis a patient may have. Thanks 🙏🏻 to him and the entire team, I am pregnant 🤰🏻. As a Latina, I feel very comfortable with them. They are highly professional, and I would give them 10 ⭐️⭐️⭐️🌟. Thank you to the Illume Fertility team..
    Aug 4, 2025
    Sep 12, 2025
    I don't get why their communication is so poor. I am so frustrated with them. I called and everytime I do, I get cut off or told someone will call back. Then 2 weeks later nothing. The only reason I am still continuing is because I do not wish to start all over again. When I consulted with the doctor I was reassured that the process from testing to implantation takes about 2 weeks. Here I am 4 months later running the staff down so I can get this over with. Sigh
    Oct 4, 2025
    We were briefly patients at Illumine *18 months ago* and still to this day receive sporadic bills related to services from 2024. It is impossible to get in touch with the billing department. We managed it a month ago and were assured that there were no other bills. We have now received a bill from a *debt collector*. This company is an absolute disaster when it comes to billing, and resolving billing issues. Avoid at all costs. Can someone from Illume contact me as a matter of urgency.
    Sep 24, 2025
    Illume is amazing! The staff at every location are kind and helpful and make you feel comfortable and safe. This is a difficult journey, and who accompanies you matters. Thank you!
    Oct 20, 2025
    Oct 20, 2025
    I switched to Illume this May and regret not doing so sooner. I am very glad I changed; the experience has been excellent. Since I switched, they have done so much for me and provided more help than my previous clinic. Highly recommended!
    Dec 16, 2025
    I honestly do not recommend this company, especially for women of color trying to become pregnant. They delay care, act very coldly, and fit a familiar pattern.
    Nov 26, 2025
    Jan 16, 2026
    Feb 13, 2026
    This was an excellent experience. Everyone was kind. Thank you for helping us throughout the journey!
    Feb 13, 2026
    Illume is wonderful. The kind, caring, and highly professional staff create a warm and comfortable atmosphere.
    Mar 5, 2026
    My experience at Illume has been excellent so far. The staff are supportive, warm, friendly, and helpful. Every visit has been punctual and well organized. Dr. Williams has been wonderful to work with throughout fertility treatment. Illume is committed to personalized care and resources that help patients feel supported at every step. I highly recommend them!
    Mar 3, 2026
    Mar 25, 2026
    May 13, 2026
    Jun 4, 2026
    好的
    Jun 4, 2026
    Jun 22, 2026
    感谢威廉姆斯医生和他的出色团队，我现在抱着我七个月大的宝宝！
    Jun 12, 2026
    如果可以，我真想给这家诊所零星。如果你想被埋没，那这里正合你意。这家诊所简直就是个流水线工厂，你的协调员根本不知道你是谁，连邮件都写不好。离开Illume诊所，转投其他诊所，是我在求子路上做出的最明智的决定。
    May 31, 2024
    May 31, 2024
    Apr 16, 2024
    The doctors and nurses are excellent, but if you encounter any billing or administrative issue, you will face billing discrepancies, errors, and network and insurance problems throughout your pregnancy. I wish them well, but no one there can explain insurance, and communication options are limited. Two different financial representatives gave me completely different information, and calling the office did not help. Their accreditation transition caused major billing problems. One person told me to make a note to remember to follow up with them over the next few weeks, rather than the other way around. I wish I could speak with someone instead of leaving this review, but it is impossible to find anyone willing to answer the phone. Update: An incorrect bill from my first week of pregnancy was not resolved until my child was 6 months old. Two stars because they finally corrected it, although I did all the work, so perhaps I deserve the stars.
    Apr 14, 2024
    Poor communication and insufficient information. Because Tiffany M. did not provide the necessary information, I missed two scheduled appointments at this clinic.
    Jan 19, 2024
    Feb 18, 2025
    Welcoming staff and knowledgeable doctors.
    May 3, 2025
    The entire experience was pleasant. I was seen and finished promptly.
    May 3, 2025
    Sep 5, 2025
    Great staff and smooth communication. So glad I found this clinic!
    Aug 9, 2025
    Aug 2, 2025
    Everyone was professional and punctual.
    Oct 23, 2025
    Working with the entire team has been a pleasure so far! Communication is clear, and everyone I have interacted with has provided valuable information and reassurance throughout. I highly recommend working with them!
    Oct 20, 2025
    A flawless fertility experience! Dr. Meyer and the entire Illume staff are kind, knowledgeable, and very professional. They explain the entire process in detail while respecting your feelings and wishes. Wonderful doctor and staff! Thank you, Illume!
    Nov 27, 2025
    We came here with unexplained infertility and never expected to become pregnant through IVF after just one cycle—with identical twins! Twice the love and twice the joy; we are overjoyed. We began treatment at Illume in June and had a successful embryo transfer in mid-October. From Dr. Meyer and Dr. Ressler to Amanda at the front desk and everyone involved in patient care, we feel extremely fortunate to have received such attentive care throughout. Even when we were anxious, they remained patient and thoughtful, showing professionalism and courtesy at every step and earning our deep trust. We look forward to sharing photos of the babies with them and highly recommend this clinic to anyone seeking fertility care. ❤️❤️ Thank you so much, and happy Thanksgiving to everyone!
    Jan 17, 2026
    Friendly and caring staff. Doctors very nice and knowledgeable.
    Feb 13, 2026
    Everyone at Illume is kind and thoughtful. The doctors and nurses are excellent and knowledgeable. I am glad I chose Illume.
    Apr 11, 2026
    Do not donate here. They are very unprofessional. The advertised $15,000 compensation is false, and the actual amount is much lower. They do not cover basic costs as other agencies do and are difficult to work with. Donate elsewhere.
    May 3, 2026
    Illume Fertility was amazing from start to finish. Dr. Ressler is kind and thorough, and everything is explained in great detail. My nurses, Katie and Rachel, supported me every step of the way and responded promptly to every email. I honestly cannot imagine a better experience.
    Dec 30, 2020
    Last year, my husband and I began our journey with Dr. L and his team. We are now pregnant and expecting our first child in June. Words cannot express our gratitude to RMACT Norwalk. They went above and beyond to make our journey as smooth as possible, and everyone from the front of the office to the back was a pleasure to work with. Friends recommended Dr. L to us, and we still thank them for that recommendation. The team was always there to help us understand the process. No question was too small or foolish for nervous parents, and we had many questions, but the staff were always there for us. We cannot wait to share photos of our baby with the people who helped make our dream come true. We will always be grateful. Loving dads, Angel and Andrew
    Jan 14, 2021
    Dr. Mark and his team are always efficient, kind, and accommodating of my needs as a patient and my work schedule. Dr. Leondires's dedication and knowledge give me confidence that I am receiving the best care.
    Oct 4, 2021
    Jun 21, 2023
    Dr. L is very judgmental and critical and has a terrible bedside manner. When he entered the room, he had nothing positive to say. He may be the rudest OB-GYN I have ever met. Unfortunately, I did not experience any of the positive qualities described by other patients. He knew nothing about me and only asked unnecessary personal questions.
    May 26, 2025
    Words cannot express how grateful I am to Dr. Leondires for the attentive care and support he gave us throughout IVF. From our first consultation, Dr. Leondires made us feel genuinely heard, understood, and cared for. His professionalism was matched by his deep empathy, and he guided us through every step with kindness, patience, and clear communication. What truly stood out was Dr. Leondires's unwavering dedication. He took time to call us personally, explain every stage in detail, and answer all our questions with empathy. During the hardest and most emotional moments, he was always there to encourage us and give us hope. This journey was not easy, but having Dr. Leondires with us made all the difference. Now, thanks to Dr. Leondires and his excellent team, we have a beautiful, healthy 5-month-old baby boy, and we are eagerly expecting our second child this December, month 12. Because of him, we now have the family we once dreamed of. We will always be grateful for their exceptional expertise, warm service, and personalized care. We sincerely recommend Dr. Leondires to anyone considering fertility treatment. You will receive the highest-quality care. Sincerely, Agus, Dan, and Tongat

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