In vitro fertilization after LHRH agonist: randomized comparison of luteal phase support by vaginal progesterone alone or associated with human chorionic gonadotropin [abstract]. - Marcolin,G.; Buvat,J.; Guittard,C.; Herbaut,J.C.; Louvet,A.L.; Dehaene,J.L. (Contraception, Fertilité, Sexualité, 1993)