Skip to main content

SEED stands for the Study to Explore Early Development. SEED is the largest epidemiological study to-date designed to compare children with autism and other developmental delays to children without these delays. The first phase of this study (SEED I) began in 2006. Together, all sites enrolled over 3700 children. The second phase (SEED II) began in 2012 and enrolled an additional 3300 children. The third phase, SEED 3, began in 2016 and will enroll another 3300 children. Results from SEED will help researchers to better understand the health and behavior of young children with autism and to identify factors that contribute to autism.

NC-SEED 3 will include children who:

  • Were born between January 2014 and December 2017 and are 2 1/2 to 5 years old at enrollment, and
  • Were born in Alamance, Chatham, Davidson, Durham, Forsyth, Franklin, Guilford, Johnston, Nash, Orange, Person, Randolph, Rockingham, or Wake county and
  • Currently live in one of the counties listed above and
  • Speak and understand English


We enrolled families from central North Carolina to participate in SEED 3.




Contact Us

Phone, toll-free: 1.866.633.8003
Fax: 919.843.0568