A new study on autism finds a possible link between the disease and how long parents wait to conceive after their first child is born.
Researchers found children conceived before their older sibling is one year old are three times more likely to be diagnosed with autism. That's compared to children spaced at least three years apart.
Scientists who conducted the study say they suspect the cause may be related to nutrients being depleted from the mother's body. Nutrients like folic acid and iron may not build back up quickly enough between close-together pregnancies.
The study was made public today in the journal "Pediatrics."