Autism five instances more prevalent in low birth pounds kids: Study Has another risk factor for autism been uncovered? A fresh study implies that low-birth excess weight premature infants are five occasions more likely to possess autism than kids who are born at a standard weight. Photos: Autism-spectrum disorders: 24 indicators For the government-funded research – released in the Oct read more . 17 problem of Pediatrics – experts tracked 862 kids born in NJ between 1984 and 1987. All weighed 4.4 pounds or much less at birth. Children had been screened for autism at birth, age groups 2, 6, 9, 16, and 21.