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.
The analyses were done using Model 2 and excluding pregnancies without registered morbidity within one year before delivery or within 30 days after delivery and excluding children with any registered congenital malformations.
