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 whole numbers represented in the x-axis (horizontal) of the graphics include 40–140 cm for height (b.1) and ≤ 30 kg for weight (b.2).
