HSCI 216 Lecture 6: HSCI 216 Lecture 6
11 Sep 2017
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Document Summary
To understand the different trajectories of male and female reproduction. To understand why female reproductive physiology limits human reproduction. To understand why human females are a special type of mammalian female. To understand how the human body handles pregnancy. There are ~2,00,000- 4,000,000 spermatozoids per ejaculate. Spermatozoids can survive up to 48 hours in the vaginal tract. Reproductive life span can be up to 55 years (based on a ~70 year life span) At birth women have about 2 million follicles. This number is reduced to~300,000 400,000 when women reach puberty. One follicle matures each month 400 follicles will mature, in the current contraceptive environment (< 100 in non-contraceptive environments) Each egg survives between 6 and 24 hours after ovulation. ~ 2-4 million spermatozoids per ejaculate + continuous production. So, a lot of what we know about reproduction in women has actually been derived from animal research (more ethical and less complicated in animals) (humans can sue)
