Question

Which hormone stop the release of FSH from the pituitary after fertilization?

• A. Placental hormone
• B. Fertilizin
• C. Estradiol
• D. Luteinizing hormone

Answer 1

The correct option is A Placental hormone

During the menstrual cycle, the corpus luteum produces the hormone progesterone. If the ovulated egg remains unfertilized, the corpus luteum stops producing progesterone. Through a feedback mechanism, this signals the pituitary gland to produce the follicle-stimulating hormone to initiate the next menstrual cycle. However, if fertilization occurs, the corpus luteum continues to produce progesterone until the placenta is established (the placenta then takes over progesterone production). Human chorionic gonadotrophin is the embryonic hormone, which ensures the corpus luteum continues to produce progesterone throughout the first trimester of pregnancy.