In addition to testosterone, what diagnostic tests are appropriate to order for a 17-year-old female suspected of having polycystic ovary syndrome?

The correct choice focuses on ordering FSH (Follicle Stimulating Hormone), LH (Luteinizing Hormone), and TSH (Thyroid Stimulating Hormone) levels, which are critical in evaluating a suspected case of polycystic ovary syndrome (PCOS) in adolescent females.

Testing FSH and LH is particularly important in the context of PCOS because the condition often presents with an imbalance in these hormones. Typically, women with PCOS exhibit elevated levels of LH relative to FSH, leading to an abnormal LH/FSH ratio that can help confirm the diagnosis. This hormonal imbalance is a central feature of the syndrome and can contribute to irregular menstrual cycles and issues with ovulation.

Additionally, measuring TSH is important because thyroid dysfunction can mimic or exacerbate the symptoms of PCOS, such as irregular menstruation and weight changes. Ensuring that the thyroid is functioning properly is vital before making a definitive diagnosis of PCOS.

Together, these hormonal evaluations provide a comprehensive view of the hormonal landscape of the patient, which is essential in confirming or ruling out PCOS. The other options do not address the need for hormonal assessment specific to PCOS or relevant to the symptoms presented in this scenario.