For birth control that states it is effective 99% of the time, is this 99% of the time woman can actually get pregnant or 99% of her entire cycle?
Say you were to have sex 3 times a week, for en entire year. That's about 156 times a year. So if a birth control method is 99% effective, wouldn't that mean (by average) you'd get pregnant within a year?
Also, when my girlfriend and I've had sex, I've knoticed alot of precum in the condom. What's the chance of this leaking from the top of the condom (I'll usually check the condom afterwards for tears) and actually making it into the vagina.
Sorry for sounding like a paranoid 13 year old
Thanks!