Day 1 of the geese was carried out on the 8th day after hatching, and eggs and dead eggs were picked out.

Normal embryonic development of fertilized eggs, radial distribution of blood vessels, bright red color; dead embryonic egg color is lighter, there are irregular blood ring, blood arc, no radial blood vessels; no egg shiny vascular network, can only see To the yolk shadow.

The second lighting was performed on the 28th day after hatching to remove the embryonic dead eggs, and the live normal embryonic eggs were transferred to the hatch tray and hatcher. The live embryonic eggs are black and red, the air chamber is tilted, the boundary is curved, and there are thick blood vessels around; dead dark red blood vessels are not visible around the dead embryonic egg chambers, the edges are blurred, some eggs are light in color, and the small hair is bright. During the incubation process, embryos and eggs are sampled from time to time in order to grasp the embryonic development and take corresponding measures accordingly.

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