Testicular failure

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Endocrine glands

Male reproductive anatomy

Primary hypogonadism - male

• Lack of libido (sex drive)
• Delay in development or absence of secondary male sex characteristics (growth and distribution of hair, scrotal enlargement, penis enlargement, voice changes)
• Infertility
• Gynecomastia (enlarged breasts in males)
• Lack of muscle mass

A physical examination may reveal:

• Genitals that do not clearly look either male or female (usually noted in infancy)
• Abnormally small testicle
• Tumor or mass (group of cells) on or near the testicle

Hormonal levels determined through blood tests may detect low testosterone levels and high levels of gonadotropins (pituitary hormones FSH and LH).

Review Date: 08/01/2005
Reviewed By: Nikheel S. Kolatkar, MD, Clinical and Research Fellow, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA. Review provided by VeriMed Healthcare Network.