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Merck Manual
Professional Version
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Professional
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Genitourinary Disorders
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Male Reproductive Endocrinology and Related Disorders
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Male Reproductive Endocrinology and Related Disorders
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Male Reproductive Endocrinology
Physiology
Sexual Differentiation, Adrenarche, and Puberty
Effects of Aging
Gynecomastia
Pathophysiology
Etiology
Evaluation
History
Physical examination
Red flags
Interpretation of findings
Testing
Treatment
Key Points
Male Hypogonadism
Etiology
Symptoms and Signs
Diagnosis
Diagnosis of primary and secondary hypogonadism
Evaluation of secondary hypogonadism
Treatment
Testosterone replacement therapy (TRT)
Treatment of infertility due to hypogonadism
Key Points