A 15 year old girl comes to GP. She has not had menarche. She is a ballet dancer in training since 6 years of age. She has maintained a strict low calorie and low fat with high protein diet since age 11. She is 5 ft 3 in and 101 lbs BMI 17.9. She exercises more than 4 hours a day and is very muscular. Her sexual maturity is Tanner stage 2. Vitals are normal. Abdo US shows uterus and ovarian size consistent with Tanner score. 1. What is her diagnosis? 2. What causes it? 3. What are serum findings associated with it?

The development of the reproductive system begins with the formation of undifferentiated gonads and the paired mesonephric and paramesonephric ducts.