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.
Associations Between Pregnancy Weight Gain and Birth Weight. Data from a) fully adjusted fixed effect model, using a reference group of 8–10kg; and b) first difference model, subtracting values of variables from the first observed pregnancy from those of the second observed pregnancy for each woman. Grey bands indicated 95% confidence intervals.
