How to prevent the death of chicken embryos before shell pecking

In the process of hatching, it is common for normal chicken embryos to be suffocated before shell pecking due to various factors, such as excellent eggshell, limited movement space of chicken embryo head or far mouth tip from eggshell. So, how to prevent this kind of phenomenon from happening?

1. Turn the eggs.

The first 10 days of incubation is the key period for the location of the blastocyst. In order to make the embryo's eye spot and head develop along the blunt end shell edge of the breeding egg, in order to facilitate the chick's mouth tip to peck the shell, the egg should be turned frequently at this stage.

During the operation, the blunt end of the egg should be kept upward, and the angle of turning the egg should be 45-55.

2. Take care of the eggs after hatching for 10 days

If the eye spot and head of the embryo are not found, but there are clear blood vessels around the air chamber, indicating that when these embryos come out of the shell, the head is generally located in the center of the air chamber or bent to the abdomen, the smooth shell rate of the chick is very low.

These embryos should be marked on the eggshell so that the chicks can be rescued when they come out of the shell.

3. The chicken embryos with normal development and normal embryo position are concentrated, and there is an obvious peak period of hatching.

In general, individuals pecked at the shell sporadically on the 19th day after hatching, and reached the peak of hatching in 14-18 hours on the 21st day.

The appropriate time for midwifery for chicks that are difficult to hatch smoothly is 1-2 hours before the peak of hatching. Premature midwifery will cause stillbirth, weak chicks or break the shell too early due to massive bleeding, and too much water evaporation will make the chicks stick to the shell; too late midwifery will suffocate a large number of misplaced chicken embryos in the shell.