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You are here: Home / Science and Research / Folic Acid For Pregnant Mothers Cuts Kids’ Autism Risk

Folic Acid For Pregnant Mothers Cuts Kids’ Autism Risk

February 13, 2013 By Eli Reshef

Jon Hamilton February 12, 2013 (NPR)

A common vitamin supplement appears to dramatically reduce a woman’s risk of having a child with autism.

A study of more than 85,000 women in Norway found that those who started taking folic acid before getting pregnant were about 40 percent less likely to have a child who developed the disorder, researchers reported in the Journal of the American Medical Association.

“That’s a huge effect,” says Ian Lipkin, one of the study’s authors and a professor of epidemiology at Columbia University’s Mailman School of Public Health.

Folic acid is the synthetic version of a B vitamin called folate. It’s found naturally in foods such as spinach, black-eyed peas and rice. Public health officials recommend that women who may become pregnant take at least 400 micrograms of folic acid every day to reduce the chance of having a child with spina bifida.

The link between folic acid and autism risk is especially striking because the supplement is so cheap and easy to get, Lipkin says. “The notion that a very simple, nontoxic food supplement could reduce your risk is profound,” he says.

There are caveats, though. To get the full benefit, mothers had to start taking folic acid supplements four weeks before conceiving and keep taking them during the first eight weeks of pregnancy. Risk reduction was also limited to severe autism, not milder forms such as Asperger’s.

Despite public health campaigns urging women in the U.S. to take folic acid, many are still not taking the supplements when they become pregnant. That may be because spina bifida and related birth defects are quite rare.

“But when you start talking about autism, a disorder that has an incidence of 1 percent or higher, that really does bring it to home,” Lipkin says. “That is a substantial risk.”

In the U.S. some foods are fortified with folic acid. Yet women often do not get enough folate through diet alone, Lipkin says, even if they eat a lot of healthful foods.

“I have nothing at all against green vegetables and beans,” he says. “But you only absorb about half of the dietary folate that you take in.”

The study of Norwegian mothers is the biggest one so far to link folic acid to a reduced risk of autism, though smaller studies have reached a similar conclusion.

“This study is reassuring that folic acid supplementation not only is safe but actually decreases the rate of autism,” says Susan Hyman, a professor of pediatrics at the Golisano Children’s Hospital at the University of Rochester.

The study also offers a reminder that brain disorders are often linked to events that take place soon after conception. “Those very first weeks to months of brain development that can provide long-lasting differences in neurologic function,” she says

Previous studies have found that factors including obesity and diabetes can also influence a mother’s risk of having a child with autism, Hyman says.

Women who may become pregnant should eat a balanced diet, exercise, decrease stress and take supplements containing folic acid “so they can have the healthiest baby possible,” she says.

http://www.npr.org/blogs/health/2013/02/12/171828067/folic-acid-for-pregnant-mothers-cuts-kids-autism-risk

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Meet Dr. Eli Reshef

The other day, another physician asked me if I had to start all over again, would I still become a physician and would I still choose Reproductive Endocrinology and Infertility as my sub-specialty. I answered with a resounding “yes”. I feel very fortunate to get up every morning looking forward to going to work. I feel privileged to have the opportunity to help people every day, that is every day, including weekends and holidays. Read More About Me Here-

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