Quote:Quote:http://www.plannedparenthood.org/health-topics/birth-control/withdrawal-pull-out-method-4218.htm</a1<b, 21<b, 21"How Effective Is Withdrawal?<b, 21<b, 21Effectiveness is an important and common concern when choosing a birth control method. Like all birth control methods, the pull out method is much more effective when you do it correctly.<b, 21<b, 21Of every 100 women whose partners use withdrawal, 4 will become pregnant each year if they always do it correctly.<b, 21Of every 100 women whose partners use withdrawal, 27 will become pregnant each year if they don't always do it correctly."<b, 21<b, 21<b, 21Clearly, the "correctly" part is the proverbial devil in the details. <b, 21<b, 21That said, I've known long term couples that use P.O. and never managed to get pregnant (by accident), much to my considerable surprise.