胚胎植入後子宮內膜是否增厚與懷孕與否無明顯相關

Endometrial thickness changes after progesterone administration do not affect the pregnancy outcomes of frozen-thawed euploid blastocyst transfer: a retrospective cohort study

https://www.fertstert.org/action/showPdf?pii=S0015-0282%2821%2901931-2

• In the euploid blastocyst transfer cycle of preparing the endometrium with HRT, the endometrial thickness change ratio after progesterone administration was not related to pregnancy outcomes. 
• Some scholars believe that when the endometrial thickness is <7 mm or 8 mm before ovulation, the cycle should be canceled because of the low clinical pregnancy rate and the high miscarriage rate (7–9). 
• Some studies have shown that the endometrial thickness at the end of proliferation ranges from 9 to 14 mm to achieve the best implantation rate and clinical pregnancy rate (10)
• The study by Bu et al. (19) showed that regardless of which endometrial preparation protocol was used, endometrial increases after progesterone administration had a higher clinical pregnancy rate.