Newborn babies cry 2-3 hours or more a day. Autistic babies are much quieter & calm than most because of lack of adequate stimulus at birth to trigger reflexive sensory pathways.

Infants & young children with autism lack the vestibulo-ocular reflex & develop a sort of "lazy eye". The vestibulo-ocular reflex accounts for head movement & is synced to inner ear membranes.

Autistic babies experience difficulties learning to sit up, crawl or walk. A lack of muscular coordination between opposing sides & residual infantile movements hinder development.

Autistic babies & children are commonly plagued by digestion issues such as constipation, bacterial infections & fussy eating habits. IBS is a common symptom for life.

Autistic babies typically have much higher pitched cries as infants because of lack of reflexive control over lungs & airways & lack of auditory perception.

Autistic children will invariably have a speech & communication development disorder that is mirrored by a hearing issue not as easily diagnosed.