Ovoskopirovanie chicken eggs. Ovoscopy of chicken eggs by days

The control over the development of embryos takes place through the transmission of eggs through the ovoscope. This allows you to adjust the subsequent conditions for their incubation.

Ovoskopirovanie chicken eggs before incubation

The illumination of eggs is carried out with the help of an ovoscope, which is installed in a darkened room. The prepared egg is brought to the opening on the device or placed on a grate and gradually it is turned.

Carrying out the chicken eggs, pay attention to the location of the yolk. Its mobility is also determined. It is necessary to select for the further incubation only those eggs, where the yolk is located in the center of the protein and is surrounded by it from all sides. Be sure to give this moment due attention.

If we consider the vertical axis, then the egg yolk is suitable for laying eggs in industrial incubators closer to the blunt end. When you turn them in different directions before the ovoscope, the yolk will slowly retreat to the side and return to its original position with the same speed. Hailstones holding it in a suspended state must remain intact. If any of them breaks off, the egg is removed from the applicants for the incubator. The breakage will be obvious in the event that the yolk does not return after turning to its former place. Eggs are also discarded, where the yolk is too close to the shell. At them in that case the vitelline membrane was ruptured, and the contents were mixed with the protein. Eliminated and those eggs that have varying degrees of blood inclusions.

Characteristics of a normal egg

For laying in industrial incubators are subject to eggs that have a homogeneous shell. The air chamber should be small and located at the blunt end. The yolk should be in the central part or be slightly approximated to the blunt end, having blurred boundaries. During rotation, the movement of the yolk must be slowed down. Inside the egg, there must be no foreign matter.

After a thorough inspection, the selected options are placed in the incubator. Ovoscopy of chicken eggs during incubation is carried out at least three times.

Defects of eggs

Before a bookmark it is possible to find eggs with various defects. They are seized and discarded. In what way can they be determined? The following eggs are considered unsuitable:

• They have light strips on the shell. This indicates that the damage to the egg occurred in the bird's oviduct. The resulting cracks were tightened by additional substances.
• With a spotted shell. These eggs have an uneven distribution of calcium.
• With side air chamber. This testifies to the stratification of the subcollapse shell.
• With a large air chamber, which indicates the old age of the egg.
• The shell has an orange-red hue. This indicates that the egg yolk of this egg was ruptured and mixed with the protein part.
• With the free movement of the yolk across and along the egg, while it does not return to its original location. This indicates that there was an abrupt breakdown.
• With a fixed yolk. This indicates an improper storage of the egg, resulting in its premature aging.
• With two yolks. Here there is a hereditary violation.
• Have inside the blood clots. This shows that the bird in the oviduct had a hemorrhage.
• The presence inside of foreign objects: a feather, a grain of sand, a worm.
• With a darkened shell. This indicates the presence of a colony of mold.

Ovoscopy of chicken eggs by days: first inspection

The first examination allows you to determine the number of fertilized eggs, how the circulatory system develops , in what position is the embryo inside. At this stage, unsuitable options are removed. The first ovoscoping of chicken eggs is carried out on the 6th day after laying (after 132 hours), meat eggs in 6.5 days. Inspection of turkey and duck eggs is carried out after 8 days, and goose - 1 day later.

Let's consider the inspection process in more detail. The egg is taken in the right hand and brought to the opening of the ovoscope. The rotation is along the longitudinal axis. If the egg has a light and uniform background, the circulatory system is not visible, and the yolk looks like a dark spot in the middle, then it is unfertilized. Therefore, it should be removed from the incubator.

Another option is possible. When the egg is fertilized, but the fetus died in the first 24 hours. Then it has almost all the signs of unfertilized. A distinctive characteristic is the shape of the embryo - here it is oval. The embryo itself is slightly enlarged and has sinuous edges. If the death occurred after 3 days, then around the embryo appears a blood ring or a red zigzag dash located near the air chamber. If the development of the embryo proceeds normally, then the circulatory system is seen. However, the embryo itself will not be visible. Now it's time to establish the degree of development of the circulatory system in the embryo.

Positive development

With an excellent development of the embryo, all the strings of the blood vessels are clearly visible in the egg, despite the fact that it is not yet visible. When shaking, you can see only the shadow of the embryo. The area of the blood vessels is located near the acute end, and the color of the shell is diluted with a pink tinge.

Satisfactory development

Here, the blood vessels are located only in the central part of the egg, that is, a slow development occurs. Sometimes you can see the fetus, but not completely. But such eggs are not excluded from the incubator, as many such embryos make up for the lag in their development.

Negative development

The embryo has a weak development and is located near the shell itself. Outwardly, it resembles the usual zyapyatuyu. Underdeveloped blood vessels are observed only in some small part of the protein. The shell becomes pale and transparent.

Second inspection

The second hoarding of chicken eggs is aimed at determining the state of the allantons. If the development of the embryo goes well, it covers completely the entire contents inside and closes in the pointed part.

With poor development, there is no lumen in the acute part, which indicates that the circulatory system does not develop. These eggs are removed from the incubator.

In case of poor development, the hatchability of the young is reduced by half. Therefore, it is recommended to extract eggs from the incubator.

Third inspection

The third ovoscoping of chicken eggs takes place just before the hitching. Here, the degree of readiness of the embryo exit is determined. The best are eggs that do not have the slightest lumen in the pointed part. This shows that the embryo has an intensive metabolism and has already reached its withdrawal condition. He completely used the inner protein. In the egg there was a significant evaporation of water, which provided an increase in the air chamber.