Schematic diagram of the experiment (IMAGE) Kyushu University Caption A diagram of the production of ovarian follicle structures and oocytes from mouse stem cells. Primordial germ cell–like cells generate the oocyte, and the fetal ovarian somatic cell–like cells produce the supporting cells. The two aggregated cells produce the follicle structure that is critical for the oocyte to mature into an egg cell. Credit Kyushu University/Hayashi Lab Usage Restrictions Only for media and non-commercial use. Credit accordingly. License Original 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.