Children are slightly more likely to develop autism if their mothers were diagnosed with diabetes early in pregnancy, a new study shows. Women newly diagnosed with diabetes by the 26th week of pregnancy were 42% more likely to have a child diagnosed with autism, according to the study of more than 322,000 children born between 1995 and 2009. Overall, about 1% of all children in the study were diagnosed with autism by a median age of age 5½. Having gestational diabetes, the kind diagnosed during pregnancy, increased the chance of having a child with autism to 1.4%. Researchers found no increase in autism risk if mothers were diagnosed with diabetes after 26 weeks of pregnancy. A typical pregnancy lasts 40 weeks.
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