ArticleFrontiers in endocrinology2025
Study on the relationship between endometrial thickness on the hCG day in the progestin-primed ovarian stimulation protocol and pregnancy outcomes in frozen-thawed embryo transfer cycles.
Article in Frontiers in endocrinology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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5 authors.
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Abstract
Objective: The aim of this study was to investigate the relationship between endometrial thickness (EMT) on human chorionic gonadotropin (hCG) day in the progestin-primed ovarian stimulation (PPOS) protocol and pregnancy outcomes in the subsequent frozen-thawed embryo transfer (FET) cycles, providing new insights into embryo transfer strategies for patients undergoing the PPOS protocol. Methods: This retrospective study included 1,748 patients who underwent the PPOS protocol. Patients were divided into two groups based on the EMT on the hCG day: group A (EMT < 8 mm) and group B (EMT ≥ 8 mm). After 1:1 propensity score matching (group A: Results: (1) In groups A and B, the biochemical pregnancy rates were 44.5% and 45.5% ( Conclusions: The EMT on the hCG day in the PPOS cycle was positively related to the pregnancy outcomes of subsequent FET, with EMT ≥8 mm associated with better pregnancy outcomes, particularly in patients undergoing blastocyst transfers.
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