News | Study confirms prolonged bed rest after embryo transfer lowers pregnancy rates; experts call for ending the traditional advice
For couples undergoing in vitro fertilization (IVF), every detail may affect whether an embryo successfully implants, develops, and ultimately results in a baby. A study led by University College London (UCL) and published in Human Reproduction Update found that resting in bed for more than 20 minutes after embryo transfer offers no benefit and instead significantly reduces the clinical pregnancy rate by 15%.
Study lead Dr. Bassel H. Al Wattar of the UCL Institute for Women’s Health and the UCLH Reproductive Medicine Unit said, ‘This is the first large analysis to comprehensively and systematically review 38 interventions used during IVF embryo transfer. The results show that advising women to remain in bed after transfer is not only unsupported but may do more harm than good.’
Data from 59,530 patients and 188 randomized controlled trials
The research team included UCL, the University of Birmingham, and University Hospitals Coventry and Warwickshire NHS Trust. They reviewed 188 published randomized controlled trials involving more than 59,530 women undergoing IVF and comprehensively assessed adjunctive procedures currently used during embryo transfer.
The findings included:
Ultrasound-guided embryo transfer significantly increased the probability of pregnancy by 26%;
Using a soft embryo-transfer catheter, which is less likely than a rigid catheter to injure the endometrium, increased the pregnancy rate by 12%;
Hyaluronic acid as a transfer medium may support embryo implantation;
Some medications, including the uterine-relaxing drug Atosiban and the pregnancy hormone hCG, showed potential to support implantation, but large studies are still needed to confirm their safety and efficacy;
Bed rest for more than 20 minutes after transfer reduced the clinical pregnancy rate by 15%, making it the only intervention with a clearly negative effect.
Experts: Encourage women to resume normal activities after transfer
Dr. Al Wattar emphasized, ‘Our data support practices routinely used by some UK clinics, such as ultrasound guidance and soft catheters. What is concerning is that prolonged bed rest provides no benefit and may cause anxiety and physical stiffness, and could even affect uterine blood flow and embryo positioning.’
The findings are also consistent with previous guidance from the American Society for Reproductive Medicine (ASRM): women should not be advised to remain on prolonged bed rest after embryo transfer and should instead be encouraged to resume light daily activities promptly, such as walking, using the restroom, and eating normally.
‘This goes against intuition,’ Dr. Al Wattar said. ‘Many patients and physicians instinctively believe that lying still will keep the embryo in place. But the scientific evidence tells us otherwise. Reproductive treatment should be optimized using data, not tradition.’
Several expensive but ineffective procedures should be suspended
The team also noted that many IVF clinics still recommend special medications, uterine flushing, assisted implantation techniques, and other measures without adequate supporting evidence. These add to patients’ financial burden and may carry potential risks.
‘IVF is currently extremely costly, and many interventions consume time and money without clear evidence of benefit,’ Dr. Al Wattar said. ‘We call on major medical research funders worldwide to increase support immediately for research on optimizing IVF, helping the many families hoping to become parents.’
He also stressed that potentially promising new interventions, including hCG and Atosiban, remain at an early research stage and ‘should not be routinely recommended until they have been validated in large studies.’
The crucial 20 minutes after embryo transfer: Normal activity, not total stillness
For patients preparing for or undergoing IVF, this study challenges the belief that remaining as still and cautious as possible after embryo transfer is best. Instead of lying anxiously on the treatment bed for half an hour, patients can leave the treatment room with their physician’s approval and resume normal life.
‘The uterus is not such a fragile container that an embryo will fall out with movement,’ said a reproductive specialist who was not involved in the study. ‘What truly affects implantation is transfer technique, the uterine environment, and embryo quality—not whether you stayed in bed for another 20 minutes.’
News | Study confirms prolonged bed rest after embryo transfer lowers pregnancy rates; experts call for ending the traditional advice
News | Study confirms prolonged bed rest after embryo transfer lowers pregnancy rates; experts call for ending the traditional advice
For couples undergoing in vitro fertilization (IVF), every detail may affect whether an embryo successfully implants, develops, and ultimately results in a baby. A study led by University College London (UCL) and published in Human Reproduction Update found that resting in bed for more than 20 minutes after embryo transfer offers no benefit and instead significantly reduces the clinical pregnancy rate by 15%.
Study lead Dr. Bassel H. Al Wattar of the UCL Institute for Women’s Health and the UCLH Reproductive Medicine Unit said, ‘This is the first large analysis to comprehensively and systematically review 38 interventions used during IVF embryo transfer. The results show that advising women to remain in bed after transfer is not only unsupported but may do more harm than good.’
Data from 59,530 patients and 188 randomized controlled trials
The research team included UCL, the University of Birmingham, and University Hospitals Coventry and Warwickshire NHS Trust. They reviewed 188 published randomized controlled trials involving more than 59,530 women undergoing IVF and comprehensively assessed adjunctive procedures currently used during embryo transfer.
The findings included:
Ultrasound-guided embryo transfer significantly increased the probability of pregnancy by 26%;
Using a soft embryo-transfer catheter, which is less likely than a rigid catheter to injure the endometrium, increased the pregnancy rate by 12%;
Hyaluronic acid as a transfer medium may support embryo implantation;
Some medications, including the uterine-relaxing drug Atosiban and the pregnancy hormone hCG, showed potential to support implantation, but large studies are still needed to confirm their safety and efficacy;
Bed rest for more than 20 minutes after transfer reduced the clinical pregnancy rate by 15%, making it the only intervention with a clearly negative effect.
Experts: Encourage women to resume normal activities after transfer
Dr. Al Wattar emphasized, ‘Our data support practices routinely used by some UK clinics, such as ultrasound guidance and soft catheters. What is concerning is that prolonged bed rest provides no benefit and may cause anxiety and physical stiffness, and could even affect uterine blood flow and embryo positioning.’
The findings are also consistent with previous guidance from the American Society for Reproductive Medicine (ASRM): women should not be advised to remain on prolonged bed rest after embryo transfer and should instead be encouraged to resume light daily activities promptly, such as walking, using the restroom, and eating normally.
‘This goes against intuition,’ Dr. Al Wattar said. ‘Many patients and physicians instinctively believe that lying still will keep the embryo in place. But the scientific evidence tells us otherwise. Reproductive treatment should be optimized using data, not tradition.’
Several expensive but ineffective procedures should be suspended
The team also noted that many IVF clinics still recommend special medications, uterine flushing, assisted implantation techniques, and other measures without adequate supporting evidence. These add to patients’ financial burden and may carry potential risks.
‘IVF is currently extremely costly, and many interventions consume time and money without clear evidence of benefit,’ Dr. Al Wattar said. ‘We call on major medical research funders worldwide to increase support immediately for research on optimizing IVF, helping the many families hoping to become parents.’
He also stressed that potentially promising new interventions, including hCG and Atosiban, remain at an early research stage and ‘should not be routinely recommended until they have been validated in large studies.’
The crucial 20 minutes after embryo transfer: Normal activity, not total stillness
For patients preparing for or undergoing IVF, this study challenges the belief that remaining as still and cautious as possible after embryo transfer is best. Instead of lying anxiously on the treatment bed for half an hour, patients can leave the treatment room with their physician’s approval and resume normal life.
‘The uterus is not such a fragile container that an embryo will fall out with movement,’ said a reproductive specialist who was not involved in the study. ‘What truly affects implantation is transfer technique, the uterine environment, and embryo quality—not whether you stayed in bed for another 20 minutes.’
Source:
Collected online