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.
Embryological origins of the frontonasal process. The paired maxillary processes (blue) and FNP (yellow) have begun development by the end of the first month of gestation. Under normal circumstances, FNP has fused with the maxillary primordia by the end of the first trimester to form the midfacial structures. IMS = Intermaxillary segment; LNP = lateral nasal process; MNP = medial nasal process; Mx = maxillary process; NP = nasal pit.
