Pregnancy and parturition
270 days after fertilization, 284 days from 1st day of MC
last month of pregnancy - _ in frequencies of uterine contractions, cervix softens and dilates, uterus contracts and expels fetus, dilatation sets up signals in afferent nerves to _ oxytocin secretion
increase in estrogen secretion leads to increase in number of oxytocin R (peak at term) and uterus contractions
placenta begins produce prostaglandin F2