St15-6.8hp

mid-neurula (6.8 hours), the neural tube has formed along most of its length. The embryo has an oval shape. The A-line neural plate also forms a neural fold.

Dorsal view of three-dimensional image (upper), 50% section image (middle), and longitudinal section image (lower). Dashed lines in middle indicate the position of the section. Black arrowheads indicate the anterior edge of neural tube closure. Scale bar = 50 micro m.