Urinating immediately after sex does not flush out all the sperm from the vagina or the reproductive tract. However, it can help to reduce the risk of urinary tract infections (UTIs) by clearing any bacteria that may have entered the urethra during sexual activity.
Sperm cells that have entered the vagina can swim through the cervical mucus and make their way towards the uterus and fallopian tubes, where fertilization can occur. Urinating after sex may help to prevent the migration of bacteria into the urinary tract but does not significantly affect the movement of sperm in the reproductive system.
If you are trying to prevent pregnancy, relying solely on urination as a method of contraception is not reliable. It is important to use appropriate contraceptive methods consistently and correctly to prevent unintended pregnancy.
If you have questions or concerns about contraception or sexual health, it is recommended to consult with a healthcare professional who can provide you with personalized advice and guidance.