Reproductive system.pdf

REPRODUCTIVE SYSTEMS The Male Reproductive System SPERMATOGENESIS Female Reproductive System (human) Female Reproductive System Ovaries Ovaries release ova and produce estrogen and progesterone Ovarian Cycle Follicular Phase FSH promotes development of follicle Follicle then...

REPRODUCTIVE SYSTEMS The Male Reproductive System SPERMATOGENESIS Female Reproductive System (human) Female Reproductive System Ovaries Ovaries release ova and produce estrogen and progesterone Ovarian Cycle Follicular Phase FSH promotes development of follicle Follicle then secretes estrogens Ovulation Release of secondary oocyte from a vesicular follicle Follicle develops in corpus luteum Degenerates if no pregnancy Luteal Phase LH promotes development of corpus luteum Corpus luteum then secretes progesterone Ovarian Cycle: Oogenesis and Ovulation  Hormonal Control of Ovaries Menopause Ovaries begin to lose their sensitivity to FSH and LH. Menstrual periods become less frequent and finally cease. Eggs and potential follicles are still present but without the stimulation of FSH and LH, they will not produce a viable egg to be released. The outcome of this is the inability to have children. Female Hormone Levels During the Ovarian and Uterine Cycles Pregnancy In humans, fertilization occurs soon after the oocyte leaves the ovary. Implantation occurs eight or nine days later. (credit: Ed Uthman)