This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sex Hormones, Subject name: Physiology
[{'content': 'Secretion of estrogen is maximum at? \nSelect and explain. \nA. Just before menopause, B. At puberty, C. At menstruation, D. Before ovulation', 'role': 'user'}, {'content': "Answer: D \nExplanation: ANSWER: (D) Before ovulationREF: Ganong's 22nded p. 24 Post menopausal estradiol levels: 35 pg / LReference ranges for serum estradiolPatient typeLower limitUpper limitUnitAdult male50200pmol/L 1455pg/mLAdult female (follicular phase, day 5)70500pmol/L11022019140pg/mL360Adult female (preovulatorypeak)4001500pmol/L110410pg/mLAdult female (luteal phase)70600pmol/L19160pg/mLAdult female - free (not protein bound)0.59pg/mL1.733pmol/LPost-menopausal femaleN/A< 130pmol/LN/A< 35pg/mL", 'role': 'assistant'}]