Abstract
Many IVF clinics use endometrial thickness as a predictive factor for IVF outcomes, as research has shown a positive association between endometrial thickness and favorable IVF outcomes. A thickness of 6-8 mm is often used as a cut-off in for the decision of whether or not to transfer an embryo in both fresh and frozen cycles. However, prior studies investigating the relationship between a thin endometrium and IVF outcomes have overwhelmingly been performed in fresh cleavage stage embryo transfers. Given the recent trend toward the transfer of frozen blastocyst transfers, we aimed to determine whether endometrial thickness predicts live birth in both fresh and frozen blastocyst stage single embryo transfers.
Highlights
Given the recent trend toward the transfer of frozen blastocyst transfers, we aimed to determine whether endometrial thickness predicts live birth in both fresh and frozen blastocyst stage single embryo transfers
In fresh blastocyst transfers (n=765), endometrial thickness as a continuous variable was significantly correlated with the odds of live birth in a generalized linear mixed statistical model
For every 1mm increase in endometrial thickness, the odds of live birth increased by 9.3% (95%CI 2.8-16.2; p=0.0044)
Summary
Effect of endometrial thickness on live birth rates in fresh and frozen embryo transfers in women under 38 years of age Trenton L. MD,1 Patrick Ten Eyck, MS, PhD,2 Bradley J. Outcomes, as research has shown a positive association between endometrial thickness and favorable IVF
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