Facial relief in the late embryonic period

Development of the face is marked by processes that are most pronounced at S17. From S18 onward, the furrows between the processes begin to disappear and the surface of the facial relief becomes progressively smoother. At the same time, the upper jaw and the nose become prominent. Both lower and upper jaws protrude equally. A transverse groove arises between the nose and the forehead.
The eyes play a significant role in the development of the embryonic face. They are initially oriented laterally. Their orientation becomes frontal with the widening of the head and the development of the cerebral hemispheres (frontalization of the eyes). The medial nasal processes come together and fuse together (medialization of the nasal primordium).
The eyelids are closed around the end of the embryonic period. The frontal prominence increases in parallel with the growth of the cerebral hemispheres. The chin becomes the prominent structure but it is still tapering off to a point.