Human reproduction OOGENESIS STEP BY STEP UNIT 5 Human reproduction OOGENESIS STEP BY STEP Biology and Geology 3. Secondary Education 1

Oogenesis step by step Ovulation UNIT 5 Oogenesis step by step Formation of the oocytes and the follicles. This takes place during the foetal stage Oocytes Follicle Phase 1. During the life of the embryo The germ cells divide and grow, transforming into oocytes. These are surrounded by other cells, called follicle cells, which form the follicle. Development is then halted until puberty. The follicle cells feed the oocyte and produce oestrogens, which are female sexual hormones. Corpus luteum Ovulation Egg Mature follicle Phase 2. From puberty on wards After puberty, approximately every 28 days. In this phase, the follicle grows and the egg in it matures and leaves the ovary; this process is called ovulation. Maturation of the follicle and the oocyte. This takes place once a month after puberty. Biology and Geology 3. Secondary Education 2