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If the egg has no white bright areas or the white bright areas are dark, if the embryonic development does not continue to expand, the eggs are unfertilized eggs and do not hatch. However, some oviparous eggs do not have animal poles at the time of earthworm production. They may be stunted and should not be removed from artificial hatching. They should be left in their original nests to allow them to continue to grow and continue to be checked after 4:00. If there is an animal after 48, there is an animal that can be removed for artificial hatching, otherwise it should be removed and thrown away.
In the artificial hatching, all the bad eggs cannot be hatched in the sand table, otherwise the hatching will be stinking, and some will flow out of the smelly water to contaminate other good eggs. So choosing a good egg is an important issue for artificial hatching.
How to identify the good and bad eggs
The egg is large and round, full and full of brilliance. If you use a hard paper to dig a small hole, put the egg into the hole and use the light, the egg will be bright and red. The secondary eggs are small and not full, and they can be seen in the eggs with grayish light and sometimes black. Secondary eggs cannot be used for hatching. However, a good egg does not mean that it is a fertilized egg. When viewed with the naked eye, a round, white, bright area at one end is the fertilized egg (the bright area is the embryonic development area, and as the embryo continues to develop, the bright white area continues to expand).