Autism Spectrum Disorder (ASD) has no biological diagnostic test to detect autism. Using formal screening tools such as looking for childhood development milestones and several other diagnostic tests and tools can help. Using free online tools such as the M-CHAT (Modified Checklist for Autism in Toddlers) can help when determining whether seeing a professional is an option. Diagnosing autism at an early stage is important when trying to navigate your Childs education. If your child isn’t reaching a majority of the developmental milestones below, be sure to talk with your doctor.