This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Normal Menstruation, Abnormal Menstruation, Menopausal Physiology and forsight of conception, Subject name: Gynaecology & Obstetrics
[{'content': 'In an Amenorrheic patient who has had pituitary ablation for a craniopharyngioma, which of the following regimens is most likely to result in an ovulatory cycle? \nSelect and explain. \nA. Clomiphene citrate, B. Letrozole, C. Continuous infusion of GnRH, D. Human menopausal or recombinant gonadotropin, followed by hCG', 'role': 'user'}, {'content': 'Answer: D \nExplanation: This Patient will not be able to produce endogenous gonadotropin, since her pituitary has been ablated. Patient need to be given exogenous gonadotropin in the form of human menopausal gonadotropin (hMG), which contains FSH and LH in various ratio for follicular growth. Timed administration of hCG, which takes the place of an endogenous LH surge, will be needed to complete oocyte maturation and induce ovulation.', 'role': 'assistant'}]