Oral micronized progesterone versus vaginal progesterone for luteal phase support in fresh embryo transfer cycles: a multicenter, randomized, non-inferiority trial
This randomized controlled trial compared oral micronized progesterone to vaginal progesterone for luteal phase support in women undergoing fresh embryo transfer cycles. The study found that oral progesterone was non-inferior to vaginal progesterone in terms of clinical pregnancy and live birth rates, suggesting that oral progesterone is a viable alternative