it’s about as effective as condoms all that sperm in pre-ejaculate was taught to u in high school so u didn’t use the pull out method. With that being said it’s a terrible method to use outside of a committed long term relationship where either of u one day want kids. Also urinate between ejaculations however even if u don’t do that and just pull out perfectly every time it’s 96-97% effective per year of use condoms are 98% and birth control is 99% per year of use.