Alan Guttmacher tells the New York Times that being a doctor ran in his family — his mother, father, and father's twin brother were all physicians — and he decided to become a pediatrician "because there you get to see the kids grow." Now, Guttmacher, the acting director of the National Institute of Child Health and Human Development, says his institute is looking to understand "the biological roots of the different types of autism." He adds that having a map of the human genome will aid their sear