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
[{'content': 'peak of progesterone secretion from corpus luteum occur : \nSelect and explain. \nA. At ovulation, B. Before ovulation, C. 3 days after ovulation, D. 8-9 days after ovulation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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', 'role': 'assistant'}]