Researchers found that the second child runs of risk of 19% in developing the disorder. The risk rises if the second child is boy, with the likelihood of a one in four chance. In comparison, if the second child is a girl the re-occurrence rate is 9%. 664 infants participated in the study, each with at least one sibling diagnosed with Autism. The infants were monitored from 6-8 months of age to 3 years.
The findings further steer Scientists to focus on the genetics of autism and pinpointing the specific chromosomal abnormality.