I really feel for kids with developmental disorders, such as autism.  I have a relative who has it
That's too bad!  There are so  many different kinds of developmental disorders - language disorders, learning disorders, motor disorders as well as autism. It's really sad!
Yes, and I found that autism is 4 or 5 times more likely to occur in boys than girls
Yes, and it's typically noticed in the first two or three years of the child's life.
And it is reported that it effects over 24 million people across the world
, these two latter conditions are not as stable as the other developmental disorders, and there is not the same evidence of a shared genetic liability.
Developmental disorders are present from early life. Most improve as the child grows older, but some entail impairments that continue throughout life. There is a strong genetic component; more males are afflicted than females.
Emergence.
Learning disabilities are diagnosed when the children are young and just beginning school. Most learning disabilities are found under the age of 9.
Young children
Developmental disorder
Developmental disorders comprise a group of psychiatric conditions originating in childhood that involve serious impairment in different areas. There are several ways of using this term. The most narrow concept is used in the category "Specific Disorders of Psychological Development" in the ICD-10. These disorders comprise developmental language disorder, learning disorders, motor disorders and autism spectrum disorders. In broader definitions ADHD is included, and the term used is neurodevelopmental disorders. Yet others include antisocial behavior and schizophrenia that begins in childhood and continues through life. However