Knowledge | Blighted Ovum: Common Causes of Early Pregnancy Loss and Management Options
A blighted ovum, also called an anembryonic pregnancy, is a common type of early pregnancy loss. It occurs when a fertilized egg implants in the uterus but does not develop into an embryo. It accounts for about half of early pregnancy losses.
How a Blighted Ovum Develops
Early in pregnancy, the fertilized egg attaches to the uterine lining. An embryo normally becomes visible at about five to six weeks, when the gestational sac is usually around 18 mm in diameter. With a blighted ovum, the sac forms and continues to grow, but no embryo develops.
A blighted ovum is usually associated with chromosomal abnormalities in the egg or sperm. Abnormal cell division may also be involved. The body ends the pregnancy because of these abnormalities. The miscarriage is not caused by anything the woman did or failed to prevent, and she should not blame herself.
Symptoms
Early signs may resemble a normal pregnancy, including a positive pregnancy test or missed period. Later signs of miscarriage may include:
Abdominal cramping
Vaginal bleeding or spotting
Heavier-than-usual menstrual bleeding
These symptoms may indicate miscarriage, although first-trimester bleeding does not always mean pregnancy loss. Prompt medical evaluation is recommended.
Diagnosis
Many women with a blighted ovum have a positive pregnancy test and missed period because human chorionic gonadotropin (hCG) levels usually rise. The placenta produces hCG after implantation and may continue growing briefly even without an embryo. Diagnosis therefore usually requires ultrasound confirmation that the gestational sac contains no embryo.
Management After Pregnancy Loss
After diagnosis, the patient should discuss next steps with her doctor. Some may need dilation and curettage (D&C), which dilates the cervix and removes remaining tissue from the uterus. This may allow faster physical and emotional recovery, and the tissue can be examined by a pathologist if needed.
Another option is medication such as mifepristone. Hospitalization is generally unnecessary, but complete passage of tissue may take several days and can involve more bleeding and side effects. Either option may cause pain or cramping, which can be managed with medication.
Some women choose expectant management and allow the body to pass the pregnancy tissue naturally. This personal decision should also be discussed carefully with a doctor to ensure safety.
Planning a Future Pregnancy
After a miscarriage, doctors often recommend waiting at least one to three menstrual cycles before trying again, allowing time for physical recovery and adjustment.
Story source:
Collected online
Published 2025-01-08
This article was prepared with AI assistance and reviewed by our editorial team before publication.
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Guide | Blighted Ovum: A Common Cause of Early Pregnancy Loss and What to Do
Knowledge | Blighted Ovum: Common Causes of Early Pregnancy Loss and Management Options
A blighted ovum, also called an anembryonic pregnancy, is a common type of early pregnancy loss. It occurs when a fertilized egg implants in the uterus but does not develop into an embryo. It accounts for about half of early pregnancy losses.
How a Blighted Ovum Develops
Early in pregnancy, the fertilized egg attaches to the uterine lining. An embryo normally becomes visible at about five to six weeks, when the gestational sac is usually around 18 mm in diameter. With a blighted ovum, the sac forms and continues to grow, but no embryo develops.
A blighted ovum is usually associated with chromosomal abnormalities in the egg or sperm. Abnormal cell division may also be involved. The body ends the pregnancy because of these abnormalities. The miscarriage is not caused by anything the woman did or failed to prevent, and she should not blame herself.
Symptoms
Early signs may resemble a normal pregnancy, including a positive pregnancy test or missed period. Later signs of miscarriage may include:
Abdominal cramping
Vaginal bleeding or spotting
Heavier-than-usual menstrual bleeding
These symptoms may indicate miscarriage, although first-trimester bleeding does not always mean pregnancy loss. Prompt medical evaluation is recommended.
Diagnosis
Many women with a blighted ovum have a positive pregnancy test and missed period because human chorionic gonadotropin (hCG) levels usually rise. The placenta produces hCG after implantation and may continue growing briefly even without an embryo. Diagnosis therefore usually requires ultrasound confirmation that the gestational sac contains no embryo.
Management After Pregnancy Loss
After diagnosis, the patient should discuss next steps with her doctor. Some may need dilation and curettage (D&C), which dilates the cervix and removes remaining tissue from the uterus. This may allow faster physical and emotional recovery, and the tissue can be examined by a pathologist if needed.
Another option is medication such as mifepristone. Hospitalization is generally unnecessary, but complete passage of tissue may take several days and can involve more bleeding and side effects. Either option may cause pain or cramping, which can be managed with medication.
Some women choose expectant management and allow the body to pass the pregnancy tissue naturally. This personal decision should also be discussed carefully with a doctor to ensure safety.
Planning a Future Pregnancy
After a miscarriage, doctors often recommend waiting at least one to three menstrual cycles before trying again, allowing time for physical recovery and adjustment.
Story source:
Collected online