A 19-year-old girl reports to her GP because she has not had a menstrual period for 16 months. Menarche occurred at the age of 13 years. Menstrual cycles had been occurring at regular 28-day intervals until 20 months ago when she started running track for school. She says she eats approximately 1000 calories daily. Which of the following is most likely to be abnormal in this patient?
ACTH secretion
Aromatization
GnRH pulsation
Ovarian follicles
5α-reductase activity
—
Cut-to-the-chase Answer (0:38):
—
HY USMLE Answer (4:49):
