a certain amount of sperm can be present and viable in some of the semen leakage that takes place during intercourse and foreplay. it is possible to get your girlfriend pregnant without ejaculating. of course you are only "90% sure that you didn't". i not clear how you came up with that statistic but i would be a bit concerned about the 10% chance that you did. i don't know if you girlfriend is pregnant or not but if you are both this sloppy about preventing pregnancy it's only a matter of time before it will happen. why in the world are you messing with mother nature? women are designed to get pregnant and men or designed to get them pregnant. by not being careful the inevitable will eventually happen. there are only a few days a month that a woman can conceive but sperm can lay in waiting for up to week in the vagina so if you left any of your little stragglers hanging around they have the potential of getting her pregnant. she may not be mid-cycle when ovulation typically takes place but why take the chance? don't be fools. if you and your girlfriend to not want to be parents but yet want to have risky sex practices then it would be in your mutual best interests to get some effective birth control or at least use a condom every time that you are having sex or engaged in this type of sexual play.
i had unprotected sex with my girlfriend. (read description). im 90 percent sure i didnt ejaculate. she's 4 days late on her period. is she pregnant? and if she gets it within a day or 2 could she still be pregnant?