Explain the initiation and regulation of labor contractionincluding all organs and hormones (and hormone-like molecules) thatparticipate in the process. Describe the positive feedbackmechanism of labor contractions. Why do you think the slowintravenous injection of synthetic oxytocin (Pitocin®) can be usedto induce parturition (childbirth)? After childbirth,pituitary-derived oxytocin also triggers milk ejection. What is theinitial stimulus for the secretion of oxytocin? What is the targetcell type of oxytocin in the mammary gland? For parturition, whichlayer of the uterus does this hormone act on?
