Dydrogesterone vs progesterone for luteal-phase support: systematic review and meta-analysis of randomized controlled trials - Barbosa, M. W. P.; Silva, L. R.; Navarro, Paula Andrea de Albuquerque Salles; Ferriani, Rui Alberto; Nastri, Carolina Oliveira; Martins, Wellington de Paula (Ultrasound in Obstetrics & Gynecology, 2016)