Question

In which case (when the ovum is fertilized or not fertilized) will the progesterone level increase?

Answer 1

If fertilization occurs, then progesterone will secreted for next 10weeks from corpus luteum, then by the placenta. If fertilization does not occur, then after 14days, the corpus luteum will degenerate into corpus albicans and the progesterone levels will fall.. leading to menstruation.