Often a Woman May First Suspect She Is Pregnant When

Often a woman may first suspect she is pregnant when she misses a period or menstrual cycle.What causes a pregnant woman to miss a period?

A) Chorionic gonadotropin causes the corpus luteum to produce progesterone
B) Chorionic gonadotropin blocks the corpus luteum from producing progesterone
C) Follicle stimulating hormone causes the corpus luteum to produce progesterone
D) Follicle stimulating hormone blocks the corpus luteum from producing progesterone
E) Luteinizing hormone blocks the corpus luteum from producing progesterone