Figure 1.
Flow chart illustrating twin-pairs examined in analyses of birth weight and ASD. ASD defined as score of ≥4.5 on the ASD module of the A-TAC.
*Note: Sex-discordant pairs were not included in analyses.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.