PSL201Y1 Lecture Notes - Lecture 13: Chorionic Villi, Blastocyst, Trophoblast
Document Summary
Endocrine 8: the female reproductive system (textbook: pages 645-660) Gametogenesis in females: oogenesis: ovaries contain germ cells called oogonia (diploid, undergo mitosis during embryonic life, primary oocytes enter, but do not complete meiosis i (replication of dna but no division) If fertilization occurs, ovum is produced (diploid) along the polar body which degenerates. Spermatogonium stays to divide the other becomes a primary spermatocyte. Symmetric- 2 secondary secondary oocyte is spermatocytes are produced from each produced from each primary oocyte primary spermatocyte. Changes in the follicles of the ovary: uterine cycle. Changes in the endometrial lining of the uterus. Steps in the ovarian cycle: follicular phase: Become primary follicles with granulosa and theca cells. A dominant follicle develops and antrum grows larger- it is called the graafian follicle: luteal phase: The graafian follicle ruptures and ovulation occurs in response to surge of gnrh and lh. Cells left behind in ovary become corpus luteum. If fertilization does not occur, corpus luteum degenerates.
