The pill is 99% effective over a year therefore 99/100 of woman taking it will not fall pregnant. Thus if a women falls pregnant whilst on the , statically she is either lying about taking it or she is being totally reckless. Thus she is providing sex on a false pretence. So in my opinion, a woman shouldn't be entitled to financial support from the state or father unless she get an agreement from the other man that he wants to be a father.