Oral progestogen versus intramuscular progesterone for luteal support after assisted reproductive technology treatment: a prospective randomized study

Objectives To evaluate the efficacy of oral progestogen, chlormadinone acetate, and intramuscular (IM) progesterone for luteal support in patients, undergoing assisted reproductive technology (ART) treatment, who were treated with a gonadotropin-releasing hormone agonist (GnRHa).