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Women who drink heavily during pregnancy are at risk of having babies with a condition called fetal alcohol syndrome, which can result in growth deficiencies, nervous system problems, lowered intelligence, and facial abnormalities in the child.

There is some evidence that pregnant women who drink more than 10 units a week are more likely to have underweight babies. It is not known if there is an absolutely safe limit for drinking during pregnancy, but it may be wise to avoid alcohol altogether.8|