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.
Comparisons among four groups of volume of bilateral testis (a), the level of FSH (b) and inhibin B (c). NOA: nonobstructive azoospermia; ESO: extremely severe oligozoospermia; CO: cryptozoospermia; OA: obstructive azoospermia; *P < 0.05; #P > 0.05.
