If I ejaculate inside my girlfriend when she’s been taking birth control on a regular basis, can she get pregnant?
When used correctly and consistently, the pill provides a very high level of protection against unintended pregnancy — regardless of whether or not semen gets into the vagina. Using the pill correctly means taking the pill as directed by a health care provider. Using the pill consistently means taking it every day. Fewer than one out of 100 women will get pregnant each year if they always take the pill each day as directed. Other types of hormonal birth control — such as the patch, the ring, the shot, and the implant — are also extremely effective at preventing pregnancy if used exactly as directed.
It’s important to remember that hormonal birth control does not protect against sexually transmitted infections. For protection against infection, couples can use condoms with their other birth control method.