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An increased serum progesterone-to-estradiol ratio on the day of human chorionic gonadotropin administration does not have a negative impact on clinical pregnancy rate in women with normal ovarian reserve treated with a long gonadotropin releasing hormone agonist protocol.
Lai TH, Lee FK, Lin TK, Horng SG, Chen SC, Chen YH, Wang PC. Lai TH, et al. Among authors: chen sc, chen yh. Fertil Steril. 2009 Aug;92(2):508-14. doi: 10.1016/j.fertnstert.2008.06.036. Epub 2008 Aug 12. Fertil Steril. 2009. PMID: 18701101 Free article.
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