BISC 101 Lecture Notes - Lecture 24: Corpus Luteum, Human Reproductive System, Follicular Phase

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If fertilizatio(cid:374) does(cid:374)"t o(cid:272)(cid:272)ur the (cid:272)orpus luteu(cid:373) disi(cid:374)tegrates. If there is no fertilization, corpus luteum degenerates, which causes progesterone levels to fall, which causes degeneration of the endometrial lining: gnrh, lh, and fsh are not inhibited any more, lh/fsh rise and new menstrual cycle begins, males: To discuss menopause and andropause: menopause occurs after about 500 cycles, between the ages 46 & 54, oestrogen levels decline and drop to well below 50, me(cid:374)opause is a (cid:374)atural (cid:271)iologi(cid:272)al pro(cid:272)ess that o(cid:272)(cid:272)urs i(cid:374) e(cid:448)ery (cid:449)o(cid:373)a(cid:374)"s life. It marks the permanent end of monthly periods (menstruation) and fertility. This means she is no longer able to have children. During this transition period, a (cid:449)o(cid:373)a(cid:374)"s o(cid:448)aries stop (cid:373)aki(cid:374)g eggs a(cid:374)d her (cid:271)ody produ(cid:272)es less estroge(cid:374) a(cid:374)d progesterone. Menopause is confirmed when a woman has no period for 12 months in a row: andropause is a condition that is associated with the decrease in the male hormone testosterone.

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