IVF funding

Radio 4's Today programme has again highlighted the post code lottery of NHS IVF provision. But why was not the obvious source of funding for this raised? NHS prescriptions for contraceptives are free. If they bore the prescription charge I think it might well fund all the IVF needed. BTW when the pill was introduced in the sixties it was only on private prescription not the NHS. But the government wants to give priority to sex not birth it seems. As the good book says, those who hate me love death.