Autism refers to a range of conditions characterized by challenges with social skills, repetitive behaviors, speech, and nonverbal communication.

There are different types of autism caused by various combinations of genetic and environmental influences.

Childhood depression relates to feelings of sadness that are different from everyday emotions that occur as a child.

Many children display sorrow or low mood, similar to adults who are depressed.

ADHD (Attention Deficit Hyperactivity Disorder) is a brain disorder marked by an ongoing pattern of inattention and/or hyperactivity.

Inattention and hyperactivity/impulsivity are the key behaviors of ADHD.

Down Syndrome is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21.

It causes developmental and intellectual delays.