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.
(a) Circumferential and radial length ratios (relative to their NP values) over the course of pregnancy. Enlargement occurs primarily in the circumferential direction, at roughly double the rate of that in the radial direction. (b) Similar monotonically increasing dimensional changes that occur at the organ level (adapted from [10]).
