Researchers at UC Davis published a survey in Epidemiology purportedly reporting on the effect of prenatal vitamins and their ability to preclude births of children with autism. Drs. Schmidt (2), Hansen, Hartiala, Allayee, Hooman, Tancredi, Tassone, and Hertz-Picciotto (UC Davis) reported that women who took prenatal vitamins BEFORE pregnancy (and during pregnancy) were ½ as likely to have a child with autism; those that had high risk mutations were associated with a 7 fold reduction.