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MSD Manual
Consumer Version
HEALTH TOPICS
HEALTHY LIVING
SYMPTOMS
EMERGENCIES
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HEALTH TOPICS
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Men's Health Issues
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Biology of the Male Reproductive System
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Biology of the Male Reproductive System
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Structure of the Male Reproductive System
Male Reproductive Function
Puberty in Boys
Effects of Aging on the Male Reproductive System
Testosterone-Replacement Therapy
Side effects of testosterone-replacement therapy
Follow-up to testosterone-replacement therapy
Breast Disorders in Men
Breast enlargement in men
Breast cancer in men