A method is provided for increasing the fertilization potential of oocytes comprising culturing oocytes in vitro with an effective amount of inhibin, activin, or a combination of inhibin and activin. Preferably the oocytes being cultured are immature. After the culturing step, the oocytes can be fertilized....http://www.google.de/patents/US5693534?utm_source=gb-gplus-sharePatent US5693534 - Enhancement of fertilization capability of oocytes
