Overseas research suggests mothers who have one or two drinks of alcohol a week during pregnancy are not harming their children.
The study, published in the British Medical Journal, was led by researchers at University College London and looked at 11,000 five-year-olds.
It suggests mothers who drink lightly during pregnancy may actually have children with better behaviour than those who do not drink at all.
It mirrors a claim by the Telethon Institute in Western Australia earlier this year.
However, New Zealand's Ministry of Health and the Alcohol Advisory Council both continue to recommend that pregnant women should not drink.