This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Gynae), Subject name: Gynaecology & Obstetrics
Normal Menstrual cycle shows 
Select and explain. 
A. Progesterone levels are highest during the secretory phase, B. LH levels are lowest in the mid cycle, C. FSH levels are highest during the luteal phase, D. Estradiol levels are highest during the midcycle
A: Progesterone levels are highest during the secretory phase
Answer: A: Progesterone levels are highest during the secretory phase 
Explanation: (A) Progesterone levels are highest during the secretory phase # Secretory phase of endometrium is controlled by progesterone> LH levels rises during mid cycle just prior to ovulation.> FSH levels are reduced during duteal phase due to inhibin which inhibits further secretion of FSH by anterior pituitary and LH receptor to secrete LH.