hello mr. thnks fr trusting HCM doctor fr ur health related queries... i guess ur concern is whether anal sex can cause ur gf pregnant..????right??? my anzr:NO.......NO.......NO.....NOT AT ALL............NO WHERE IN UNIVERSE THIS CAN HAPPEN.......so chill,n relax... girl bcomes preggy when ovum meets sperm..sperm is present in semen of penis..semen is that white lotion guys ejaculate...ovum will be present inside uterus.....vagina connects to uterus...so wen men ejaculate sperms travel to uterus via vagina...n pregnancy happens.. normally,there is no anatomical connection between anus and uterus...so dude chill out.....no need worry at all.......be tension free-be befikare .!!!!!!! well with abv discussion u can try out my suggestions:- 1.i insist u couples to do sex using condoms.... 2.sometimes these condoms rupture due to robust or zhabardast sex....in such instances u can use i-pill,,availble at ur nearby medical stores at affordable prices..... 3.whenever ur gf says she missed her menses.....then do ur urinary pregnancy test,tis test kit r availble ar ur nearby medical stores at affordable prices..buy it,as ur gf to do it herself....if negative then she is not pregnant,,if positive then visit a nearby gynecologist fr further help.. i hope tis was informative enough,helpful n useful fr ur query. regards:dr.sudha rani panagar..