Sperm is not affected by hormonal birth control; it does the same thing it does if you're not on birth control, except that there's some decrease in how much sperm can get into the uterus (due to thickening of the cervical mucus). Hormonal birth control affects the egg.
Birth control doesn't affect the sperm's life span. They can live about five days.
Yes. However you decrease the chances by taking your birth control correctly and by using condoms.
You can go on birth control when you have herpes.
Spermicide works by killing sperm. The copper IUD works by interfering with sperm motility.
This can be consdiered a form of birth control. Sperm in the mouth does not cause pregnancy. Sperm elsewhere can. Keep the sperm where it will do the least harm.
If you're on Birth Control and using the Withdrawal Method then you're at the very least as safe as you would be on Birth Control. If you look at it as a percentage though... Less sperm in the vagina reduces the possibility of pregnancy and Birth Control lessens the possibility of Pregnancy as well. So, in effect, you're safer. -Note: The Withdrawal Method is not an effective form of contraceptive.
A birth control cap is a soft rubber cap that aids in birth control. The cap is placed inside of a woman and while having intercourse, it aids in keeping sperm away from the uterus.
If you stop you'll probably end up pregnant. Yes sperm is still in you. Birth control controls the hormones in your body so the birth control is already doing it's job. By the time your body absorbs the sperm or disperses it, ( a couple of days), the birth control hormones are still present so it is unlikely you would get pregnant at this time. But after this, you won't be protected against pregnancy and your chances of becoming pregnant increase every day after that. In other words, it takes a few days for the birth control to stop working even after stopping the birth control.
Because if there is no sperm in the ejaculate there is no fertilization.
It depends on what birth control method you're referring to. If using hormonal birth control this stops fertile cervical mucus being produced, thus the sperm will not survive for long within the acidic environment of the vagina - a few hours to a few days at most. Obviously if you were using spermicide the sperm wouldn't survive more than around 30 minutes to an hour.
Birth control methods like the pill, shot, patch, rings, etc. have no effect on sperm, semen, or pre-ejaculate.