[Lizzie]

Abstainace is the only way to complelty prevent pregnancy.

If you are going to be sexually active and that includes only for a few seconds, you need to use some form of birth control like a condom. She can get on the pill, the shot or the patch by seeing her doctor.

There are no tricks or methods like peeing to kill sperm, that will lessen the chance of pregnancy. Just do the safe thing and use birth control next time.