Childhood disintegrative disorder (CDD) occurs when a child regresses in multiple areas of functioning after about 2 years of typical development. It is part of autism spectrum disorder (ASD).

Developmental delays can affect a child’s physical, cognitive, communication, social, emotional, or behavioral skills. Often, delays affect more than one area of development. When a child has delays ...

If a child is still babbling at 2 years old and has not started using words, it may be a sign of a speech delay. However, some babbling that accompanies words and gestures may be part of their typical ...