Are vaccines to blame? See how this theory unfolded and where today's science stands on this controversial issue.
Click here for the recommended immunization schedule from the American Academy of Pediatrics.
Click here to read an excerpt on the signs of autism from Dr. Ari Brown’s book Toddler 411. Dr. Brown is an official spokesperson for the American Academy of Pediatrics.
Click here to learn more about early detection and intervention for autism spectrum disorders.
Click here to watch Part 1: Three families share their stories and their struggles.
Click here to watch Part 3: Pediatricians discuss where they stand on vaccines.
Click here to watch Part 4: Dr. Oz reveals what he did for his own children.
Click here to watch Part 5: The role of environmental risk factors.
Click here to watch Part 6: Older mothers and autism – is there a link?
Click here to watch Part 7: Warning signs every parent should know.