By RONI CARYN RABIN Published: June 13, 2011 Scientists have identified an unexpected factor that may play a significant role in the development of autism: prenatal vitamins. A new study reports that mothers of children with autism and autism spectrum disorders were significantly less likely than mothers of children without autism to have taken prenatal vitamins three months before conception and in the first month of pregnancy. The finding, published in the July issue of the journal Epidemiology, suggests that taking vitamins in this period may help prevent these disorders, reducing the risk by some 40 percent. If you would like to read more of this article click HERE for NYT