NFS 203 Lecture Notes - Lecture 2: Methyl Group, Progestin, Progestogen
28 Apr 2017
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Biological inability to have kids after 1 yr unprotected sex. Reduced level of fertility w/ long time to conception (over 12 months) of repeated pregnancy losses. The capacity of one individual can make up for the diminished potential of the other. Can be diminished via diet, weight and lifestyle improvements. 30-50% conceptions lost by resorption into the uterine wall within the first 6 weeks after conception. 9% lost by miscarriage in first 20 weeks of pregnancy. Gnrh stimulates pituitary gland to release fsh and lh. Fsh prompts growth of follicles, stimulates estrogen production within the follicles. Lh causes secretion of progesterone which prompt uterine wall to store glycogen and nutrients. Blood levels of fsh and lh are highest prior to ovulation (day 14) and the lh surge causes the release of an ovum from a follicle for ovulation. Corpus luteum from the original follicle that released the ovum secretes progesterone and estrogen which inhibit production of gnrh.
