When I got the MMR vaccine I was told to wait four weeks after vaccination before getting pregnant. I became pregnant within 4 weeks of getting the MMR vaccine. Should I be worried?

It’s best to wait at least four weeks after getting an MMR vaccine before getting pregnant because live vaccines like measles, mumps, rubella (MMR) should generally not be given during pregnancy. They have not been proven to be safe for pregnant people and their babies. There is a theoretical risk to the fetus (baby) when the pregnant person receives a live virus vaccine, however, if you received the MMR vaccine before realizing you were pregnant don’t worry too much. Although getting the MMR vaccine during pregnancy is not recommended as a matter of caution, the risks to you and your baby are low and are not a reason to end your pregnancy. If you have further questions, we recommend you speak to your pregnancy care provider.