This condition involves overproduction by the ovaries of hormones (such as testosterone) that stimulate the development of male characteristics.

In healthy women, the ovaries and adrenal glands produce about 40 - 50% of the body's testosterone. Excess androgen production in the ovaries may result from tumors of the ovaries or adrenal glands, polycystic ovarian disease (characterized by enlarged ovaries containing multiple fluid-filled cysts), Cushing's disease (an abnormality in the pituitary gland resulting in excess amounts of corticosteroids, hormones which alter body fat distribution), and congenital adrenal hyperplasia (a group of disorders caused by an enzyme defect during fetal development).

• Increase in body hair in a male pattern (hirsutism)
• Oily skin
• Acne
• Virilization (development of masculine characteristics, such as a low-pitched voice)
• Decrease in breast size
• Changes in female body contour
• Temporal balding (thinning hair and hair loss)
• Increase in muscle mass
• Clitoromegaly (enlargement of the clitoris)
• Amenorrhea (absence of menstrual periods)

• Testosterone
• DHEA-S
• 17-hydroxyprogesterone
• ACTH test
• Pelvic ultrasound
• CT scan