I have irregular periods. Can I still get pregnant if I don't get my period all the time? – Kim* Yes! Any time a girl has unprotected sex, she has the potential to become pregnant. Getting pregnant is related to ovulation — the time that a girl is most fertile and has the highest chance of getting pregnant. A girl with irregular periods still ovulates, just not on a regular, predictable schedule. All girls, especially girls with irregular periods, can ovulate at different points from cycle to cycle. That makes it impossible for a girl to know when she is most fertile. Irregular periods also can make it hard for a girl to know if she is pregnant, since she doesn't know when to expect her period. Pregnancy shouldn't be the only concern about having sex, though. Any time you have sex, especially unprotected sex, you risk getting a sexually transmitted disease (STD). Condoms are the best way (other than abstinence, of course!) to protect against both pregnancy and STDs. *Names have been changed to protect user privacy. Back to Articles Related Articles When's the Best Time to Have Sex and Avoid Pregnancy? Find out what the experts have to say. Read More How Do You Know If Your Period Is Regular? Find out what the experts have to say. Read More STDs (Sexually Transmitted Diseases) You've probably heard lots of discouraging news about sexually transmitted diseases. The good news is that STDs can be prevented. Find out how to protect yourself. Read More Irregular Periods Wondering whether it's normal to have irregular periods? Get the facts about this common problem. Read More About Birth Control Before you consider having sex, you need to know how to protect yourself. Read this article to get the basics on birth control. Read More Can a Girl Get Pregnant if She Has Sex During Her Period? Find out what the experts have to say. Read More My Periods Are Irregular. What's Going On? Find out what the experts have to say. Read More Can a Girl Get Pregnant Right After Her Period Ends? Find out what the experts have to say. Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.