When are boys able to get a girl pregnant?

Boys are able to get a girl pregnant when they begin to produce sperm in their semen. This generally begins when they start puberty, which can be from ages 11 to 14. Until puberty begins, males are unable to get a female pregnant.
Dianne Parker
Dianne Parker on behalf of MDLIVE
Pediatrics

A girl usually ovulates 2 weeks before her period and this is the most frequent time she can become pregnant. However, a girl can ovulate any time especially during the teenage years when there are menstrual irregularities and therefore ovulation is not regular. Birth control is important at all times for protection.

Dr. Mehmet Oz, MD
Cardiology (Cardiovascular Disease)
As soon as a boy ejaculates, he is making sperm that can fertilize an egg. In other words, all guys are carrying a loaded gun in early puberty, and anytime it can shoot, it can deliver sperm. So, sex, even at a young age can result in pregnancy--hence the saying, “No glove, no love,” until you’re ready to have kids.
YOU: The Owner's Manual for Teens: A Guide to a Healthy Body and Happy Life

More About this Book

YOU: The Owner's Manual for Teens: A Guide to a Healthy Body and Happy Life

A few years ago, we wrote YOU: The Owner’s Manual, which taught people about the inner workings of their bodies—and how to keep them running strong. But you know what? There’s a big difference...

Continue Learning about Teen Perspective: Sexuality

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.