what are the menstrual cycle phases? what happens on each day, and what are the hormones released?, types of female pelvis? which ones are good or not for child birth?, how does the arteries and veins work in umbilical cord? how much nutrients does the baby receives from it?, what is the function of placenta? how does it work?, what are the parts of female (outer) genetalia? and describe each functions., what are the parts of female (inner) reproductive system? describe each functions., how and when fertilization happens? , how and when implantation happens?, explain fetal development week-by-week. what's happening to the fetus as it is developing in the womb.

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恢復自動保存: ?