 Image Number K8409-9 |
Animal physiologist Lawrence Johnson displays a pig born as a result of studies using sorted sperm and in vitro fertilization.
Photo by Keith Weller.
An official website of the United States government
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.