[IB Biology SL at GHS: Human Reproduction]
14. At the end of pregnancy, what must happen in order for oxytocin to be released to induce labor?

A) progesterone levels must drop

B) human chorionic gonadotropin levels must increase

C) estrogen levels must drop

D) progesterone levels must increase

E) estrogen levels must increase

------ [Answer] ------
Slichter