HE201- Final Exam Guide - Comprehensive Notes for the exam ( 156 pages long!)
Document Summary
There are a lot of physiology adaptation and changes that occur during pregnancy and birth. Reproductive system is highly regulated by hormones. Ovum once ovulated from the ovaries: lives for about 72hour: viability for fertilization is probably shorter. Sperm: lives for about 120h once in the female reproductive tract. The time for optimal fertilization is around day 1: when the egg is still in the fallopian tube, once fertilization occurs, a zygote forms. A zygote goes to the uterus via the fallopian tube: as it travels, cell cleavage occurs continuously. By 3-4 days a very large number of cells have been formed: known as the morula (special mass of dividing cell) By 4-5 days after fertilization, the cells have begun to organize themselves into trophoblast cells: this bowl of cells is now turned into blastocyst. The blastocyst passes into the body of the uterus begins to implant around the wall of the uterus; occurs around.
