Enhancement of primate oocyte maturation and fertilization in vitro by inhibin A and activin A**This work was presented in part at The American Fertility Society 49th Annual Meeting, October 9 to 14, 1993 and American Society of Reproductive Medicine 51st Annual Meeting, October 7 to 12, 1995.††This work was performed as part of the National Cooperative Program on Non-Human In Vitro Fertilization and Preimplantation Development and by the National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland through cooperative agreement HD28484; and also supported by grants HD18185, RR00163 from the National Institutes of Health, Bethesda, Maryland and by Genentech Inc., South San Francisco, California;