honeypot link
skip to main content
Professional
Consumer
MERCK MANUAL
Consumer Version
HEALTH TOPICS
HEALTHY LIVING
SYMPTOMS
EMERGENCIES
DRUG INFO
RESOURCES
COMMENTARY
ABOUT US
HEALTH TOPICS
HEALTHY LIVING
Home
/
Men's Health Issues
/
Biology of the Male Reproductive System
/
Biology of the Male Reproductive System
Expand all
Collapse all
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