ASDs: Asds begin before age 3. some show sxs within the first few months. Others not until 18 to 24 months of age. Early signs relate to so called social reciprocity and active interaction with the environment including reacting to movement, and objects, turning toward sound, responding to people's faces, and returning a smile. see more here: http://www.Cdc.Gov/ncbddd/actearly/index.Html.
Answered 5/7/2016
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