Oocyte (IMAGE) Penn State Caption The cumulus-oocyte complex, consisting of the oocyte -- the cell from which an ovum develops -- and surrounding cumulus granulosa cells, is the target of researchers for development of novel contraception technologies. Credit Francisco Diaz lab Usage Restrictions Non commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.