This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Reproductive physiology and hormones in females, Subject name: Gynaecology & Obstetrics
peak of progesterone secretion from corpus luteum occur : 
Select and explain. 
A. At ovulation, B. Before ovulation, C. 3 days after ovulation, D. 8-9 days after ovulation
D: 8-9 days after ovulation
Answer: D: 8-9 days after ovulation 
Explanation: LH initiates and maintains the corpus luteum from which both estrogen and progesterone are secretedProgesterone attains its highest peak 8 days after LH SurgeProgesterone acts to suppress the follicular growthThe lifespan of corpus luteum is about 12-14 daysRef: D.C. Dutta&;s Textbook of Gynaecology, 6th edition, page no: 93