how do you know if a girl is pregnant?

missed period, headaches, tender breasts, nausea and lower backaches and somtimes a womens neck darkens if they sleep more than usasul and moodysometime some of these sytoms occur when starting there period

if u r pregnant u will stop having ur period for nine months ( untill the baby is born) and also her tummy will get big she will eat more and have mood swings. or u can get a pregnancy test from the pharmacy section at almost any store :)