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.
Two successive aspects of differentiating capillary plexus, at day 8 ((a) original magnification: 40x; scale bar: 10 μm) and day 11 ((b) original magnification: 100x; scale bar: 5 μm) of incubation. The chorionic epithelium in (b) shows early cellular proliferation. Toluidine blue staining. M. G. Gabrielli, unpublished.
