Early signs of Autism every parent should know! Children with Autism Spectrum Disorder (ASD) usually show some signs of delayed development before the age of 2. Here are some common signs to look for in babies up to 24 months… - Doesn’t respond with a smile or happy expression by 6 months - Doesn’t mimic sounds or facial expressions by 9 months - Little or no “babbling” by 12 months - Doesn’t gesture, such as point or wave, by 18 months - Doesn’t say two-word phrases by 24 months - Loses languag