11. It is a killer of oocytes in immature ovarian follicles in mice and rats. 12. The resulting hMG induces the stimulation of several ovarian follicles . 13. Folliculogenesis is the mechanism by which the ovarian follicles mature. 14. The remainder die off over time in a continuous process called ovarian follicle atresia. 15. The ovarian follicle forms about 16 days prior to the birth of the offspring. 16. The embryos actually suckle from ovarian follicles , ingesting nutrients and gases from these internal structures. 17. Theca cells are only correlated with developing ovarian follicles . 18. Presently, ovarian follicle volumes can be measured rapidly and automatically from three-dimensionally reconstructed ultrasound images. 19. But with aging, female mice lose their ovarian follicles , which are eggs plus surrounding support cells. 20. In females, gametogenesis is known as oogenesis which occurs in the ovarian follicles of the ovaries.