 [ Symptoms ] effectiveness of birth control  my girlfriend 18 years old takes her pill exactly on time every single day within 3 minutes of her 900pm time never any later we have unprotected sex we have already been tested and have no worry of stds and i ejaculate inside of her although she takes her pill exactly on time every single day is there a chance that she could become pregnant [ Disease ] if condoms were perfect you could work but unfortunately condoms can accidentally break or leak and a woman can get pregnant from other risky sex play where semen may get near the vaginal area do not get me wrong condoms are good just not 100 you are really taking a risk since an unintentional pregnancy while on this fetal toxic medication could cause serious fetal abnormalities as you have read talk to your dermatologist or primary care provider maybe you can use a back up hormonal contraceptive like depo provera as well as use that condom two forms of contraception or be sexually intimate without intercourse