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.
Cross-sections of the entire placenta at E18.5, from FB (A) and IVF (B) groups stained with H&E. S, Spongiotrophoblast layer; L, labyrinth layer. C–F, Representative microscopic fields from slides stained with an antibody to Ki67. Black arrows indicate positive staining and white arrows negative staining. G–J, Representative microscopic views of placentae stained with an antibody to cleaved caspase-3 in the labyrinth and spongiotrophoblast layers. Scale bar, 100 μm.
