Ovarian follicle: Anatomy, purpose, and medical conditions An ovarian follicle is a fluid-filled sac in the ovary containing an egg that has not yet matured During the menstrual cycle, an egg matures, the follicle opens,and releases the egg, preparing it
Ovarian Follicle: Anatomy, Purpose, Reproductive Health An ovarian follicle is a tiny fluid-filled sac inside the ovary, where eggs grow Each follicle contains one immature egg The egg matures during the menstrual cycle, and at ovulation, the follicle ruptures and releases a mature egg Learn more