This site has some good info also.
From
http://www.firstsigns.org/
Healthy Development
Hallmark Developmental Milestones
Concerns About a Child
Red Flags
Sharing Concerns: Parent to Physician
Sharing Concerns: Physician to Parent
Sharing Concerns: Parent to Parent
Screening Process: Making Observations
Screening Guidelines
Developmental Screening
Audiological Screening
Lead Screening
Autism Screening
Referral Process: Taking Action
Early Intervention
Your Local School District
Understanding Your Insurance Plan
What's Next?
Developmental Delays and Disorders
Autism Spectrum Disorder
Other Developmental Disorders
Treatments
Parent Resources
Related Sites and Literature
Guest Columns
Printable Documents
Physician Resources
Related Sites and Literature
First Signs Screening Kit
Screening Tools
Current Research
Printable Documents