“Dear Experts: I had sex with my girlfriend one day using a condom and the day after without a condom. I ejaculated inside of her, so is there a chance she could be pregnant?”
Yes, there is a chance she could get pregnant. Each year, in the United States, about 3.5 million women have an ‘unintended’ pregnancy. This means that she was not planning on getting pregnant and either did not use any type of birth control or used birth control incorrectly.
The only sure way to not get pregnant, is to not have sex! That means, if you are having sex and do not want to become pregnant, then you have to use birth control all the time. Condoms are not the most reliable form of birth control but do provide protection against sexually transmitted infections. The two of you should talk about the different birth control options and choose the one that works best for her. If you are not sure of the different types of birth control, make an appointment with a health care provider and discuss all options along with possible side effects.
To help prevent an unintended pregnancy you need to use a condom every single time you have sex. Condoms offer excellent protection against sexually transmitted infections (STI) and again, should be used every single time you have sex, even if the woman is taking birth control.
Remember, you need to use a new condom with each time you have sex too! Most health departments will give free latex condoms and will even give instructions on the proper care and use of condoms.