Researchers said just one or two glasses of wine a week could reduce a woman's chance of becoming pregnant by a third. And three or more glasses cuts the odds of conception by two-thirds.
But abstaining altogether raises your chances by 90 per cent.
Health workers say women trying for a baby should have no more than three small glasses of wine a week – but preferably none at all.
Dr Dara Godfrey, of New York fertility clinic Reproductive Medicine Associates, told the American Society for Reproductive Medicine in Boston that teetotal women in the study had a 90 per cent chance of becoming pregnant.
Those who drank throughout the week reduced their odds by up to 70 per cent. But binge-drinking could make the problem worse, she said.
"My advice at the end of the day is to limit alcohol to very low amounts or to abstain completely," she said.
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