<s>[INST] I recently had sex with my boyfriend. we were fooling around for awhile then he started rubbing his penis on me and he inserted it for no longer then 10 seconds, he didnt ejaculate but there is a chance he pre-came, what are the chances Im pregnant? [/INST] Dear, We understand your concerns went through your details. Whether pre-cum contains sperm cells or not, is a million-dollar question. But for sure, the sperm cells contained or come out along with pre-cum, is not strong enough or liquid enough to travel through the vagina and reach the egg within you. Therefore, the chances of pregnancy is bleak in the given scenario. If you require more of my help in this aspect, please use this URL. http://goo.gl/aYW2pR. Make sure that you include every minute detail possible. Hope this answers your query.  Further clarifications are welcome. Good luck. Take care. </s>