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.
3-D reconstructions of mouse embryos in utero at different developmental stages: 1, head; 2, forelimb; 3, hind limb; 4, pinna of the ear; 5, eye; 6, yolk sac; 7, uterine wall; 8, follicles of vibrissae. (a) 13.5 dpc, (b) 15.5 dpc, and (c) 17.5 dpc. Scale bars correspond to 1 mm. Adapted from Ref. 114.
