Human menopausal gonadotropin versus recombinant follicle-stimulating hormone in normogonadotropic women down-regulated with a gonadotropin-releasing hormone agonist who were undergoing in vitro fertilization and intracytoplasmic sperm injection: a prospective randomized study - Westergaard,L.G.; Erb,K.; Laursen,S.B.; Rex,S.; Rasmussen,P.E. (Fertil Steril, 2001)