1. Center for Reproductive Sciences (F.F., S.M., M.C.), University of California, San Francisco, San Francisco, California 94143
2. Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research (F.F., M.C.) University of California, San Francisco, San Francisco, California 94143
3. Department of Obstetrics and Gynecology and Reproductive Sciences (F.F., M.C.), University of California, San Francisco, San Francisco, California 94143