If semen comes in contact with vaginal area does showering or wiping prevent pregnancy?

Not: If it enters inside .use more effective birth control methods

No: It only takes 1 sperm to fertilize an egg resulting in pregnancy. See doctor and get on birth control. Use condoms as a backup measure and to protect from STD's.

Here are some ...: If both partners are healthy and sexually function well, the best chance to conceive is ejaculate semen inside the vagina at right timing; anything less will dwindle such odd. In fact, no known contraceptives come with 100% success. Nonetheless, do HPT in a wk after missing period and repeat it in another wk if the 1st test is (-) or still in doubt. More? Ask gyn-doc timely.