Prospective randomized study of human menotropin versus a follicular and a luteal phase gonadotropin-releasing hormone analog-human menotropin stimulation protocols for in vitro fertilization - Maroulis,G.B.; Emery,M.; Verkauf,B.S.; Saphier,A.; Bernhisel,M.; Yeko,T.R. (Fertil Steril, 1991)