Human recombinant activin-A alters pituitary LH and FSH secretion, follicular development and steroidogenesis during the menstrual cycle in rhesus monkeys - Stouffer,R.; Woodruff,T.; Dahl,K.; Hess,D.; Mather,J.; Molskness,T. (J Clin Endocrinol Metab, 1993)