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.
Three-dimensional rendered images of the fetal skeleton at 20–22 weeks’ gestation showing: (a) X-ray mode of the skull bone with frontal suture (SS) and anterior fontanelle (AF), and (b) HD skeletal mode of the skull, bones of the upper and lower limbs.
