Which of the Following Statements Is True of Events During

Which of the following statements is true of events during childbirth?

A) Progesterone inhibits and estrogen stimulates contractions of uterine muscle.
B) Mechanical stimuli increase the release of oxytocin by the posterior pituitary.
C) Both hormonal and mechanical stimuli contribute to the onset of labor.
D) The onset of labor is marked by increased oxytocin secretion by the pituitaries of
Both mother and fetus.
E) All of the above