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Pregnant women advised to continue taking folic acid supplements

A preliminary study about autism is raising concerns in the medical community. Researchers found new mothers with high levels of folic acid and vitamin B12 were more likely to have kids diagnosed with autism spectrum disorder. Doctors and health officials stress that women should keep taking prenatal supplements proven to prevent other serious birth defects. Dr. Tara Narula joins "CBS This Morning" to discuss the study.
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