Using emergency contraception (EC), also known as the morning-after pill, more than once does not affect a woman's fertility — and it will not prevent her from becoming pregnant in the future. Women should feel free to use EC whenever they think it's necessary.

How many times can you take Plan B before becoming infertile?

While there's no limit to how many times you can take Plan B, that doesn't mean you should treat it like a standard birth control pill that you take regularly. You only need one dose of Plan B for each episode of unprotected sex. Taking more than one dose won't increase your chances of avoiding pregnancy.

Can Plan B affect future pregnancy?

Plan B won't harm a developing fetus. If Plan B is taken mistakenly during pregnancy, it will not harm the developing fetus. Using Plan B will not affect a woman's ability to become pregnant in the future. Women can keep pills at home in case of an emergency.