What is a percentage of you becoming pregnant if you have unprotected sex and he doesn't ejaculate?

Unprotected sex: Look, unprotected sex is not worth risk of having a baby if you're not ready to have a baby. And you could become pregnant even if he doesn't ejaculate inside you. Ever hear about precum? Worse, even if he doesn't make you pregnant, he could give you (or you could give him) some/many sexually transmitted diseases. So if you want to have sex, be smart & use birth control. And make him wrap it up!

< 1%: If the withdrawal method is done correctly, then < 10% of couples who use this method every time for a year will still become pregnant. If not done correctly every time, just under 30% of couples will conceive in a year. The rate without pulling out at all is closer to 85%. The stats for a single episode can't be reliably calculated because that's very difficult to test, but it would be under 1%