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.
Morphologies of porcine follicles after vitrification. a–e: Follicles were categorized as normal after vitrification between the graphite sheets. f–j: Follicles were categorized as damaged after vitrification on the copper sheet. Each arrow shows a pyknotic oocyte nucleus (f), shrunken ooplasm (g–j) and disorganized granulose cells (j).
