This is how YOU know if your baby is autistic. There are lots of different traits to identify people on the autism spectrum, and usually these traits are more common in later years from around 3 years and up. However there are some indicators that you can see in babies to know if they are autistic or not. These are just indicators and not formal diagnosis of an autism spectrum disorder. Here are 3 indicators or signs that your baby may have autism. 1.Sensory Issues Children with autism may have