This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Physiology & Histology, Subject name: Gynaecology & Obstetrics
[{'content': 'Fetal ovary can produce estrogen by: \nSelect and explain. \nA. 6 weeks, B. 8 weeks, C. 10 weeks, D. 12 weeks', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is b, i.e. 8 weeksRef: William Gynae 3rd/ed, p350"In utero, the fetal human ovary has the capacity to produce estrogen by 8 weeks of gestation"', 'role': 'assistant'}]