how long does sperm lives in you?

How long does sperm lives in u? Even when taking birth control?

Average is 3-4days, with possibilities of up to 7 days for the survival of the sperm in the fallopian tubes. Birth control methods vary and use different methods so there would be different answers for the second part of the question. Condoms that stay intact would block the fluids from exchanging so therefore an intact condom would kill that 3-4day or even 7 day length of survival. Spermacides should kill the sperm on contact, but it is not 100% efficient. So the best answer to the second part of your question would be: The sperm that actually made it free of spermicides would still last the same as without the birth control.