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.
Median of standard deviation (SD) of grayscale intensity values of testicular parenchyma, from 4th to 40th week of life (blue arrow: first ejaculate; orange arrow: spermatozoa first seen in ejaculate; green arrow: total sperm count > 200 × 106 in ejaculate).
