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Androstenedione is a hormone produced by the adrenal glands and ovaries/testes that serves as a precursor to testosterone and estrogen. This test is used to help evaluate excess hair growth, irregular periods, and suspected adrenal or reproductive hormone disorders.

PTH is a hormone produced by the parathyroid glands that regulates calcium and phosphorus levels in the body. This test is used to evaluate parathyroid gland function and diagnose causes of abnormal calcium levels, bone disorders, or kidney disease.