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Male Reproductive System

The Male Reproductive System Channel answers your questions about parts of the male anatomy and how they function. Learn how the different parts of the male reproductive system work in this section.

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Ejaculation

What is the definition of ejaculation? Learn about what's happening during ejaculation and its purpose in reproduction.


What a Drop in Male Dog Fertility May Say About Human Male Fertility

A study of male dogs showed a decline in fertility, which could have implications for humans too. Learn more at HowStuffWorks Now. See more »

Attention, Men: Live to 100, With One Horrible Trade-off

A study showed eunuchs lived a decade longer than others. Discover the link between testosterone and health at HowStuffWorks Now. See more »

Do men hit their sexual peak in their 20s?

Do men need to take advantage of their sexuality early on? Learn if men really hit their sexual peak in their 20s at HowStuffWorks. See more »

Do new fathers have lower testosterone than single men?

Do new fathers have lower testosterone than single men? Find out whether childrearing affects men's testosterone levels. See more »

10 Things Women Should Know about Male Hormones

What should women know about male hormones? This list from Discovery Health has what women should know about male hormones. See more »

10 Causes of Testicular Pain You Shouldn't Ignore

Testicular pain -- most men would rather ignore it than go to the doctor. See 10 causes of testicular pain you shouldn't ignore. See more »

Testosterone and Estrogen Balance in Men

Testosterone and estrogen balance in men can help reduce the development of health issues. Learn about testosterone and estrogen balance in men. See more »

Circumcision

What is the definition of circumcision? Learn about the origins, risks and benefits of circumcision. See more »

Ejaculation

What is the definition of ejaculation? Learn about what's happening during ejaculation and its purpose in reproduction. See more »

Erection

What is the definition of an erection? Learn what's happening during an erection and how dysfunction occurs. See more »