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.
Endometrial thickness, fresh blastocyst transfer, frozen blastocyst transfer, single embryo transfer, live birth
The authors report no conflict of interest.
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Place TL, Mejia RA, Sparks AE, Summers KM, Duran EH, Ten Eyck P, Van Voorhis BJ. Effect of endometrial thickness on live birth rates in fresh and frozen embryo transfers in women under 38 years of age. Proc Obstet Gynecol. 2018 Oct 29;8(3):Article 29 [2 p.]. . Free full text article.