This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders in Menstruation, Subject name: Gynaecology & Obstetrics
[{'content': 'A 30-year-old athlete complains of amenorrhea for 1 year. Her BMI is 20 kg/m2. LH and FSH are in low normal range. Clinical and USG findings are normal. Most likely cause is: \nSelect and explain. \nA. Depression, B. Excessive exercise, C. Premature menopause, D. Anorexia nervosa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is b, i.e. Excessive exerciseThis athlete has BMI =20kg/m2, i.e. she is underweightHer FSH and LH are in low normal rangeAll these findings point towards that either there is a problem in hypothalamus or pituitary.One of the causes of hypothalamic amenorrhea is excessive exercise which is the most probable cause in this case.', 'role': 'assistant'}]