Even if it’s someone’s first time having sex, if sperm enter the vagina, a pregnancy may happen. This could be when a couple has vaginal sex and a partner ejaculates (releases a fluid called semen or “cum” that carries sperm).

Someone could also become pregnant if their partner ejaculates near the vagina or pulls out before reaching full sexual excitement. A bit of fluid called pre-ejaculate (“pre-cum”) could come out of the penis at this time, and it can carry sperm.

It's also possible to get a sexually transmitted disease (STD) when you have sex, including the first time. Having vaginal, oral, or anal sex; using fingers; or having other sexual contact can put someone at risk for getting an STD.

How Can I Prevent Pregnancy and STDs?

The only way to fully prevent pregnancy and STDs is abstinence (not having sex).

If you do have sex, the best way to avoid getting pregnant is to use a reliable form of birth control, like birth control pills or the shot.

Condoms can also help prevent pregnancy but aren’t the most reliable method for that. But they are the best way to avoid STDs, so be sure to use one each time you have sex.

Talk with your doctor about what type of birth control is best for you. You can also visit a health clinic like Planned Parenthood.