ArticleFrontiers in endocrinology2025
Clinical impact of progesterone levels on HCG trigger day in a follicular long-term IVF protocol.
Article in Frontiers in endocrinology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
1 citing paper in PubMed.
- Development and external validation of a three-stage model to predict live birth after fresh IVF/ICSI embryo transfer.Frontiers in endocrinology · 2026Article
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11 authors.
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Abstract
Background: Previous studies have shown that elevated progesterone (P4) levels on human chorionic gonadotropin (HCG) trigger days may affect endometrial tolerance. However, no standardized threshold has been established for the impact of late follicular phase P4 on clinical outcomes. This study aimed to assess the influence of P4 levels on the day of HCG trigger in a follicular long-term protocol on clinical outcome. Methods: This retrospective study analyzed 889 fresh Results: A significant correlation was identified between the P4 level and both the clinical pregnancy rate ([CPR] OR: 0.54, 95% CI: 0.37 - 0.81, Conclusions: In blastocyst transfer cycles, the P4 level on the HCG trigger day shows a curvilinear association with the outcomes of pregnancy. The optimal threshold was found to be as 1.0 ng/mL.
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