1. Intramuscular versus vaginal administration of progesterone for luteal phase support after in vitro fertilization and embryo transfer. A comparative randomized study;Abate;Clinical & Experimental Obstetrics & Gynecology,1999
2. Luteal phase support with 17alpha-hydroxyprogesterone versus unsupported cycles in in vitro fertilization: a comparative randomized study;Abate;Gynaecologic and Obstetric Investigation,1999
3. Luteal phase hormone levels after in vitro fertilization and embryo transfer (IVF-ET): a prospective randomized trial of human chorionic gonadotropin (hCG) vs. intramuscular (im) progesterone (P) for luteal phase support following stimulation with gonadotropin-releasing hormone agonist (GnRH-a) and human menopausal gonadotropins (hMG) [abstract];Albert,1991
4. Luteal phase support in assisted repoductive cycles using either vaginal (Crinone 8) or systemic (Prontogest) progesterone: results of a prospective randomized study;Anserini;Minerva Ginecologica,2001
5. Placental protein 14 secretion during in vitro fertilization cycles with and without human chorionic gonadotropin for luteal support;Anthony;Fertility & Sterility,1993