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A Phase III randomized controlled trial of oral dydrogesterone versus intravaginal progesterone gel for luteal phase support in in vitro fertilization (Lotus II): results from the Chinese mainland subpopulation

Dong-zi Yang,G. Griesinger,Wei Wang,F. Gong,X. Liang,Hanwang Zhang,Ying-pu Sun,E. Kahler,C. Pexman-Fieth,J. Olofsson,H. Tournaye,Zi-jiang Chen

Published 2019 in Gynecological Endocrinology

ABSTRACT

Abstract Lotus II, a randomized, open-label, multicenter, international study compared the efficacy and safety of oral dydrogesterone versus micronized vaginal progesterone (MVP) gel for luteal support in IVF. A prespecified subgroup analysis was performed on 239 Chinese mainland subjects from the overall study population (n = 1034), who were randomized to oral dydrogesterone 30 mg or 8% MVP gel 90 mg daily from the day of oocyte retrieval until 12 weeks of gestation. The aim was to demonstrate non-inferiority of oral dydrogesterone to MVP gel, assessed by the presence of a fetal heartbeat at 12 weeks of gestation. In the Chinese mainland subpopulation, there was a numerical difference of 9.4% in favor of oral dydrogesterone, with ongoing pregnancy rates at 12 weeks of gestation of 61.4% and 51.9% in the oral dydrogesterone and MVP gel groups, respectively (adjusted difference, 9.4%; 95% CI: −3.4 to 22.1); in the overall population, these were 38.7% and 35%, respectively (adjusted difference, 3.7%; 95% CI: −2.3 to 9.7). In both the Chinese mainland subpopulation and the overall population, dydrogesterone had similar efficacy and safety to MVP gel. With convenient oral administration, dydrogesterone has potential to transform luteal support treatment.

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