Birth control is the responsibility of both partners, not one. if he didn't wear a condom or keep track of her cycle then they are both responsible for the outcome. A woman can be a responsible adult and use different methods to avoid pregnancy, and so can a man, but if pregnancy occurs they are both "to blame".
i disagree with u. one a lady allows the man to ave sex with her without wearing a condom she has take full responsibility with regards to pregnancy. therefore it is th lady's reponsibility to make sure that she dnt fall pregnant unless ofcoz they had agreed to have a bby together.