ArticleJournal of human reproductive sciences
Does Serum Estradiol Prior to Progesterone Administration in Programmed Frozen Embryo Transfer Cycle Impacts Live Birth Rate: A Prospective Cohort Study.
Article in Journal of human reproductive sciences. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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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.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
1 citing paper in PubMed.
- Human placentation: foundations and implications for reproductive endocrinology and infertility.Systems biology in reproductive medicine · 2025Review
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: There is a paucity of data on the optimal threshold of oestradiol (E2) levels required for successful implantation as this is a valid question to be answered, considering that significant number of Aim: The aim of this study is to investigate the serum E2 levels before starting exogenous progesterone in artificial autologous frozen thawed embryo transfers on pregnancy outcomes. Settings and Design: This was a cohort study wherein clinical data of 213 artificial autologous programmed hormone-regulated frozen embryo transfer (HR-FET) cycles were collected. Materials and Methods: The HR-FET cycles were divided into three groups based on the E2 levels before starting progesterone: Group A: E2 ≤300 pg/mL, Group B: E2 301-500 pg/mL and Group C: E2 >500 pg/mL. After adequate endometrial stripe was appreciated by transvaginal ultrasonography, single blastocyst transfer was performed in all the cycles. Statistical Analysis Used and Results: The clinical pregnancy rate (CPR) in Groups A, B and C were 41.8%, 73.5% and 0.95%, respectively ( Conclusion: Serum E2 levels in the range of 301-500 pg/mL before starting progesterone in programmed FET cycle are associated with an improved CPR and LBR and also decreased MR as compared to the extreme values of E2 ≤300 pg/mL or >500 pg/mL.
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Registered trials
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