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Can a girl get pregnant if she has sex during her period?
Jamie*

Yes. A lot of people think that if a girl has sex during her period, she can't get pregnant. But it is possible for a girl to get pregnant while she is bleeding. This can happen for a couple of reasons:

  • Not all vaginal bleeding is a menstrual period. Sometimes a girl will have a small amount of vaginal bleeding at the time of ovulation — the time when she is most fertile. Girls who are ovulating sometimes have some vaginal bleeding that can be mistaken for a period.
  • Sometimes ovulation can happen before the bleeding from a girl's period has stopped or within a few days after her period is over. All girls can ovulate at different points from cycle to cycle, making it impossible for a girl to know exactly when she is most fertile. Because sperm can fertilize an egg for 72 hours (3 days) after ejaculation, having sex during a girl's period is risky.

Having unprotected sex at any time is risky: Along with the chance of getting pregnant, you can also get a sexually transmitted disease (STD), such as chlamydia, genital warts, or HIV. The only way to prevent pregnancy and STDs is abstinence. If you do have sex, use a condom every time to protect against unplanned pregnancy and STDs. And talk to your doctor about additional forms of contraception.

Reviewed by: Julia Brown Lancaster, RN
Date reviewed: January 2013

* Names have been changed to protect user privacy.

 
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All About Menstruation
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Can a Girl Get Pregnant if Her Periods Are Irregular?
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Talking to Your Partner About Condoms
Some people - even those who are having sex - are embarrassed by the topic of condoms. Here are some tips for talking about condoms with your partner.
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Related Resources:
American College of Obstetricians and Gynecologists (ACOG)
This site offers information on numerous health issues. The women's health section includes readings on pregnancy, labor, delivery, postpartum care, breast health, menopause, contraception, and more.
National Campaign to Prevent Teen and Unplanned Pregnancy
This site provides teen pregnancy facts, resources, and prevention tips.
Teenwire
This site from the Planned Parenthood Federation of America has information on relationships and sexual health for teens.