Drinking During Pregnancy

Pregnant women who have up to two alcoholic drinks per week do not harm their children, a U.K. study shows.
More than 11,500 children and their mothers were included in the study. Mothers were first asked about their alcohol use when the kids were 9 months old. The children were last given a battery of behavioral and cognitive tests when they were 5 years of age.
Women were defined as light drinkers if they had no more than one or two drinks a week. A drink was defined as a very small glass of wine, a half pint of beer, or a small single measure of spirits.

In the U.K., women are advised not to drink at all during the first trimester of their pregnancy and to drink no more than a drink or two a week after that.
In the U.S., pregnant women are strongly advised not to drink at all.
Pressman points out that women who are light drinkers during pregnancy tend to be from households with relatively high incomes. Children in high-income households tend to perform better on behavioral and cognitive tests -- which could mask some possible harms from their mothers' light drinking during pregnancy.

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http://www.medicinenet.com/script/main/art.asp?articlekey=120565