12-05-2010, 05:36 PM
A 17-year-old girl is brought to the health center by her mother because the girl has had only two menstrual periods in the past 8 months. She had regular menstrual periods from menarche at age 14 years until 18 months ago. For the past 18 months she has been training as a long-distance runner.
Item 1 of 2
26. The underlying mechanism of her menstrual dysfunction is best defined by an abnormality in which of the following serum concentrations?
A
) Androstenedione
B
) Creatine kinase
C
) Luteinizing hormone
D
) Testosterone
E
) Thyroid-stimulating hormone (TSH)
Item 1 of 2
26. The underlying mechanism of her menstrual dysfunction is best defined by an abnormality in which of the following serum concentrations?
A
) Androstenedione
B
) Creatine kinase
C
) Luteinizing hormone
D
) Testosterone
E
) Thyroid-stimulating hormone (TSH)