'Could my child have autism? ' Ten signs of possible autism-related delays in 6- to 12-month-old children

'Could my child have autism? ' Ten signs of possible autism-related delays in 6- to 12-month-old children: Though autism is often not diagnosed until the age of three, some children begin to show signs of developmental delay before they turn a year old. While not all infants and toddlers with delays will develop autism spectrum disorders, experts point to early detection of these signs as key to capitalizing on early diagnosis and intervention, which is believed to improve developmental outcomes.