Prospective, randomized, controlled study of in vitro fertilization-embryo transfer with a single dose of a luteinizing hormone-releasing hormone (LH-RH) antagonist (cetrorelix) or a depot formula of an LH-RH agonist (triptorelin) - Olivennes,F.; Belaisch-Allart,J.; Emperaire,J.C. (Fertil Steril, 2000)