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.
Box plots of the median and interquartile range of weight gain at each measurement time point according to prepregnancy body mass index (BMI) category. Participants were included in 2 or 3 boxes each according to how many study visits they attended. The box plot for the underweight category is not shown because of the small sample size (n = 58).
