NEW YORK, Feb 13: Women who took extra folic acid in the weeks before and just after becoming pregnant were less likely to have a child with autism, in a new study from Norway. Because lack of folic acid has been tied to brain and spinal cord birth defects, groups including the U.S. Preventive Services Task Force (USPSTF) already call for women who may become pregnant to take daily supplements containing the B vitamin. (agencies)