Mail OnlineOpinionContraceptive pills ‘need ”don’t leave it too late” warnings’Female oral contraceptive pills blister on pink background. Women contraceptive hormonal birth control pills. Planning pregnancy concept. Copy space, flat lay.share Contraceptive pills ‘need ”don’t leave it too late” warnings’Professor Adam Balen said the pills should come with an alert over pregnancy He compared the proposed warnings to those currently on cigarette packets Professor said warnings are needed because fertility plummets in late 30s A leading fertility doctor has called for packets of condoms and contraception pills to carry fertility warnings similar to health advice on boxes of cigarettes.