General information

Ovoskop: how to properly equip eggs


Every poultry farmer who breeds chickens is interested in getting healthy and strong chickens. For this it is very important to choose a quality material for incubation. Ovoscopy of chicken eggs will help to recognize the worthy fruit. Thanks to this method, it is possible to timely detect cracks in the shell and examine the fruit itself. How to carry out this procedure correctly, will help to find videos and tips in our article.

What is an ovoscope and what is it for?

Ovoskop called the device designed to implement the biological control of incubation and determine the quality of chicken eggs. It has a different shape and size, but most often represents the type of case, inside which there is an electric bulb and oval holes. It is in them that the eggs are placed, and the ovoscopic examination is performed. Thus, the shell and the internal structure of the fetus are visible. Ovoscopy allows you to check the freshness of chicken eggs and determine their suitability for incubating chickens.

We carry out the procedure correctly

In order to properly ovoskopirovaniya during incubation, you should follow these steps:

  • the device must be placed on a flat surface and put it into working condition by pressing the “ON” button,
  • The egg should be placed in the appropriate hole. If the model of an ovoskop has the form of a flashlight, then in this case it is sufficient to enlighten the fruits with a device before and during incubation. In this case, they must be held in hand.

There is no need to conduct ovoskopirovaniya every day. In this case, there is a risk of damaging the fetus. In addition, its temperature decreases after extraction from the incubator, which may entail unfavorable changes.

During the inspection of eggs with an ovoscope, a normal fetus must meet the following criteria:

  • uniform shell,
  • relatively small airbag on the blunt side of the fetus,
  • the central location of the yolk,
  • absence of any foreign inclusions and defects,
  • in the process of rotation the yolk rotation is carried out with delay.

The eggs that have passed the selection can be safely used for incubation. Make a device for ovoskopii can do it yourself. Do not miss the next video from the author artur denor, which provides detailed instructions.

Identify pathology

When radiography, special attention should be paid to the location of the yolk, as well as its mobility. The quality of the fruit is indicated by the presence of the yolk in the center and its uniform immersion in protein on all sides. If, while rocking, he slowly moves to the side, while returning to the site at the same pace, it means that the gradients that support the yolk are intact. When they break, the return of the yolk does not occur, and such chicken eggs are not suitable for incubation.

In addition, one should discard the fruits in which the yolk is tightly pressed to the shell, or its contents are combined with the protein mixture. Not suitable for incubation and those instances in which blood stains or other defects are visible.

Early incubation

The first translucency after egg laying is carried out after 6 days. Unfertilised and inanimate fruits extract, and the rest examine and determine the state of the circulatory system. About normal maturation of the embryo, we can speak with complete confidence if the vascular filaments of the circulatory system are visible. And the embryo itself, as a rule, cannot be discerned. His shadow is visible only with a slight wiggle.

If the embryo is tightly pressed against the shell and is visible as a dark comma, these signs indicate its poor development. An imperfect circulatory system is also noted, which results in the absence of a vascular grid. Such an egg gets a pale color.

Late incubation period

Last ovoskopirovaniya held immediately before the advent of chickens into the world. This procedure allows the identification of chicken eggs with inanimate fruit. It can also be used to estimate the maturation of the embryo at a late period of incubation. If it occupies almost the whole egg, while outlines are seen and movements are sometimes seen, then it is possible to draw a conclusion about the normal development of the fetus.

The presence of a bright speck without strands of blood vessels from the side of the sharp egg end indicates a slow development of the embryo. Inanimate embryos when ovoscopic eggs have the appearance of a shapeless mass.

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What is an ovoscope?

Ovoskop is special devicewith the help of which biological quality control of the filling material is performed. The principle of its work consists in scanning the bright lamp of eggs that are pre-installed and fixed in the corresponding recesses of the ovoscope. Bright light can detect even minor defects.

The protein should be practically transparent, and the yolk should be located inside so as not to touch the walls. Accordingly, the analysis should pay attention to the presence of blood in the protein, the presence of breaks in the shell of the yolk, etc. With regard to various kinds of defects (cracks or other damage that are on the shell), they will appear dark in the process of ovoscoping. spots or streaks. Almost all ovoskopov work on the network standard voltage 220 VThere are also portable options. Most often, the device is designed for simultaneous testing of several eggs. The only exception would be the home-made donoscopes (sometimes hand-made), which allow you to examine only one fruit.


Hammer leg-catcher acquired this name because of its appearance.

What does such an ovoscope look like? In shape, it really reminds hammer. Working with this type of device is quite simple. On the handle is a button on the lamp. Holding the device by the handle, the poultry farmer conducts scanning the required number of eggs.

TO features This type of ovoskopov include the following:

  1. You can work with the device not only from the network, but also using a battery or batteries.
  2. It is important to choose the power of the light flux, because in order to check the eggs with an ovoscope, you need high-quality light. However, he should not overheat the fetus itself, because it must be borne in mind that the work is carried out with live material.
The main advantage Hammer overhead scanner is considered the fact that for scanning the backfill material it is not necessary to get it from the tray. This reduces the number of manipulations, increases the speed of work and, importantly, minimizes the likelihood of causing the material to remove any damage.


Vertical ovoskop is most practical and frequently used species. The instrument case has a vertical shape, the lamp is at the bottom. Material for inspection is placed in special holes that are located on top of the ovoskop.

The weighty advantage of this type of device is that the eggs do not need to be held with your hands, but you can simply lay on top. You can also place and examine several eggs at the same time. Ovoskopov are on sale, which make it possible to enlighten four to tenthat significantly saves time. The most convenient model of the vertical ovoskop is deservedly the one where the egg tray is removable - it repeats the standard form of purchased cardboard trays. In order to unload the eggs for inspection, a cardboard tray with material for testing is covered with a tray of an ovoskop, and then the structure is turned over. By the same principle, eggs are easily removed after analysis.


In the horizontal ovoskopov light source is also located down below designs and pointing up. At the same time the opening for check is sideways. It is possible to enlighten the eggs with such an ovoscope, leaning them against the hole - the advantage is that in this case they do not overheat, because the light is directed not directly at them, but upwards. But there is a significant disadvantage of this type of device - you can check at most one unit at a time. Such ovoskopov buy much less than others. Most often, this type of device is made by hand. In fact, it is just a box with a hole and a light bulb. But here it is important to understand that this option is extremely fire hazardtherefore only non-flammable materials should be used.

The stages of ovoscopy: when and how to check eggs

The process of ovoskopirovaniya eggs of different species of birds is absolutely identical. But the scan time and the required number is somewhat different.

Too often, ovoscopy of chicken eggs is not necessary. The optimal interval between treatments should be at least 4-5 days.

  • Starting from the fourth day, you can already see if the egg is fertilized. Blood vessels and even the shadow of the embryo should be visible. The glow becomes pinkish.
  • During the second inspection, the allantois is visible - this is the respiratory organ of the embryo, which, if properly developed, should line the entire surface of the shell from the inside and close at the sharp end. The embryo itself at this time is also quite large and must be shrouded in blood vessels.
  • At the very end of the incubation, the last ovoscopic examination is carried out. With it, you can identify frozen fruit and generally assess the progress of the incubation process during the second phase. The embryo in this period already occupies almost the entire space in the shell, all its outlines are well translucent, and even slight movements can be seen.

Before incubation is carried out ovoscoping goose eggs for the purpose of rejecting those from which the chicks will not hatch. These include those where there is an enlarged air chamber (usually old units), as well as those that have micro cracks in the shell, breaks in the yolk shell, various darkening (this may be mold).

In the process of incubation are held stilltwo translucencies:

  1. The first analysis is carried out on the eighth day. When translucent, you can see the threads of blood vessels.
  2. During the second inspection, which falls on the fourteenth day, the embryo itself is clearly visible.

Duck filling material is subject to copying. three times.

  1. The first procedure is carried out on the eighth day. Visible is a grid of blood vessels, indicating the presence of an embryo.
  2. The second scanning is carried out on the 21st day, now the embryo is clearly visible.
  3. On the 25th day, during the third translucency, it is possible not only to see the embryo, but also to track the features of its development. If there were any deviations, then such an egg is rejected.

View the turkey egg through the ovoscope should three times.

  1. The first scanning is necessary to assess the correct location and integrity of the yolk, as well as to determine the size of the air chamber, which should be no larger than a regular coin in diameter.
  2. The second ovoskopirovaniya carried out on the 8th day of incubation. At this time, the embryo is seen, and the circulatory grid is formed.
  3. The third scanning is necessary on the 25th or 26th day. During this period, the eggs gradually pecked. In the lumen they must be completely dark, which indicates the presence of a developing embryo there.

Ovoskopirovaniya - Mandatory step in breeding chicks from eggs. It helps to reject poor-quality filling material at the initial stage, as well as to monitor the development of embryos in the future.

What is ovoscoping?

Ovoscoping is a simple and at the same time very informative method of researching eggs. They shine with a special device - ovoscope - to determine the quality of development of the chick. If you put the eggs in front of a light source, you can see its contents, and this technology has been used for a very long time.

In the old days, simple candles were used for this purpose, but modern ovoscopes make it possible to obtain much more information when scanning. Most models are cases in which light sources are located, and in the upper part there is a lid or lattice with oval holes for eggs. There are also portable laposcopes made in the form of flashlights.

With the help of ovoskopirovaniya can carefully control the process of incubation development of the chick. For examination, eggs are laid out on a special surface (grid) intended for this, after which they shine through them from the bottom, while the contents can be well examined.

You can make a simple ovoscope yourself. To do this, it is enough to fix a light bulb on the bottom of the carton box, having supplied electricity to it. On top of the box you need to place a lid with a hole in which an egg will be placed for inspection. To create a directional flow of light, a reflector can also be mounted with the bulb at the bottom.

When to ovoskopirovaniya?

Too often it is not necessary to ovoskopirovat eggs. If they are incubated by chickens, ongoing surveys are stressful for the bird. In addition, during the procedure there is a risk of damaging the hatchlings that have not yet hatched. Three translucences for the entire incubation period are sufficient.

The first ovoskopirovaniya can be carried out after 4-5 days after oviposition. In this examination, non-living and unfertilized embryos can be separated so as not to engage in their incubation.

The second translucence is carried out after 7-8 days of incubation of the egg. A large dark germ should already be visible at this time. Allantois on this period lining the shells on the inside completely, covering the protein and closing in the sharp end of the egg. It is allowed to have a small distance between its edges, which will soon close.

The last third screening is carried out shortly before the time of chick release from the eggs. As a result of this procedure, you can select eggs that contain dead embryos that died after the second scanning. In addition, later ovoscoping allows to assess the degree of maturation of the embryo.

Rules of the procedure

There is nothing difficult in conducting ovoskopirovaniya. For this you need:

  1. place the device on a flat surface
  2. turn it on, that is, light the lamp,
  3. place the egg in its intended place, and then examine its contents.

If the ovoscope has the form of a flashlight, during the examination it is necessary to put the egg in its upper part or hold it in your hand, directing a stream of light at it. It is necessary to carry out the procedure in a dark room, then the contents of the egg will be perfectly visible. During the inspection, you can use a magnifying glass, in this case, thanks to the increase will be able to clearly see all the details.

Ovoskopirovaniya eggs with dark shells, solid brown or spotted - more difficult task than the study of eggs with a bright shell. It is much more difficult to see the contents in this case, but the technology of the process itself is the same.

In order to obtain all the necessary information as a result of ovoscoping, one must be able to distinguish between a normally developing embryo and an embryo, the growth of which occurs with pathologies. To do this without experience can be difficult.

Therefore, it is better to study ovoskopirovaniya under the direction of someone who has already managed to fill his hand in conducting this survey. It may take a long time to master the inspection of an egg in an ovoscope.

Ovoskopirovaniya need to spend in a warm room, the duration of the procedure should not exceed five minutes. If these conditions are not met, there is a risk of harm to the embryo.

What is the hanger for chickens and what is its advantage in comparison with mixed feed? Like this we told here.

Can broiler chickens be carried? Find out about it in our article.

What pathologies can be revealed by the screening of eggs?

A normally developing egg without pathologies has the following features:

  • its shell is uniform,
  • On the stupid end of such an egg is a small air chamber,
  • the yolk is in the middle of the egg,
  • during rotation, the yolk rotates with a slowdown, that is, slower than an egg,
  • The egg has no extraneous inclusions.

Early transiplaning allows you to determine freshly laid eggs that look healthy when examined - they can be sent for further incubation. When ovoskopirovaniya need to pay attention to the vascular grid. If the blood vessels of the circulatory system are viewed, this is a good sign that indicates the proper development and the possibility of breeding healthy offspring of chickens. It is difficult to see the embryo at this time, but it is often seen when the egg is rocking.

If, on the other hand, the embryo is pressed to the shell for a weekly period, and its outlines resemble a comma, it can be concluded that the development has so far gone badly. Another characteristic symptom of problems is a weakly pronounced vascular grid and pallor of the egg.

In addition, the unsuitability of the egg for further incubation is indicated by:

  • appearance of a blood ring,
  • the occurrence of blood points
  • blood streaks in the egg contents.

Кровяное кольцо — это красный круг, который отчетливо виден внутри яйца. Оно возникает после гибели зародыша, когда кровеносные сосуды уходят из центра и находятся рядом со скорлупой. The appearance of blood points and streaks also suggests that the eggs stopped developing.

If, at the last egg xing at a late developmental period, the embryo occupies almost all the internal space, the outlines of the chick are clearly visible and the way it moves is seen, it can be concluded that the development has passed normally and the chicken will hatch soon.

The timely ovoscoping allows to reveal problems in the development of embryos and to select eggs that are unsuitable for further incubation. It is easy to carry out such an examination, for this you only need a dark room and an ovoscope, which is easy to do on your own. The main thing is to be able to identify the signs of pathology, in which case it will always be possible to detect spoiled eggs. This may not be easy at first, but this procedure poses no particular difficulty for experienced poultry farmers.

Ovoskopirovaniya chicken eggs by day

During the entire incubation period, ovoscoping is performed several times. This allows you to track the development of the embryo and reject eggs that are unsuitable for further incubation. It is not recommended to remove the eggs from the incubator for more than 25 minutes.

3 day incubation

The egg on the third day of incubation is well translucent, and you can see:

  • yolk,
  • an air chamber at the blunt end of the egg.

Determine whether it is fertilized or not, while it is impossible.

4 day incubation

When ovoskopirovaniya visible:

  • airbag at the blunt end,
  • the beginning of the development of blood vessels
  • easy heartbeat of the fetus.

5 day incubation

When scanning you will see:

  • airbag at the blunt end,
  • the blood vessels increased by more than half of the egg, they are clearly visible - this means that the embryo is actively developing.

6 day incubation

  • air chamber,
  • blood vessels filled almost the entire egg
  • visible movements of the embryo itself.

7 day incubation

When scanning you will see:

  • germ movements
  • well developed blood vessels (fill almost all eggs),
  • air chamber.

11 day incubation

When ovoskopirovaniya visible:

  • air chamber,
  • the blood vessels are clearly visible, the entire egg is completely filled,
  • the egg is no longer translucent, as on the seventh day, it has a darker shade.

15 day incubation

The following changes are noticeable:

  • the egg no longer has such a lumen as on the eleventh day,
  • the translucent part has blood vessels
  • clearly visible air chamber.

19 day incubation

When ovoscoping you will see that:

  • the egg has almost no lumen
  • the embryo is developed almost completely, but is not yet ready for breeding,
  • the air chamber is clearly visible.

Ovoscopic chicken eggs before incubation

Transmission of eggs is carried out using an ovoskop, which is installed in a darkened room. The cooked egg is brought to the hole on the device or placed on a wire rack and little by little it is turned.

When ovoskopirovaniya chicken eggs, pay attention to the location of the yolk. Also determined by its mobility. It is necessary to select for 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 pay due attention to this moment.

If we consider the vertical axis, then yolk is suitable for laying in industrial incubators eggs closer to the blunt end. When turning them in different directions in front of the over-eyescope, the yolk will slowly move to the side and return to its original position with the same speed. Gradients holding it in limbo should remain intact. If at least one of them breaks, the egg is removed from the applicants for the incubator. A precipice will be obvious if the yolk does not return to its original place after turning. Those eggs where the yolk is too close to the shell are culled. They then break the yolk membrane, and the contents mixed with protein. Excluded are those eggs that have varying degrees of blood inclusions.

Characteristic normal eggs

For laying in industrial incubators, eggs that have a uniform shell are suitable. The air chamber should be small and located at the blunt end. The yolk should be in the central part or be a little close to the blunt end, have blurred boundaries. During rotation, the movement of the yolk should be slowed down. There must be no foreign matter inside the egg.

After a thorough inspection, the selected variants are placed in an incubator. Ovoscopic chicken eggs during incubation is carried out at least three times.

Positive development

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

Third inspection

The third ovoskopirovaniya chicken eggs is carried out before the naklyom. Here is determined the degree of readiness of the exit of the embryo. The best are the eggs that do not have the slightest clearance in the peaked part. This shows that the embryo has an intensive metabolism and has already reached its excretory condition. He fully utilized the inner protein. In the egg, a significant evaporation of water occurred, due to which an increase in the air chamber was ensured.

How to shine eggs?

No need to disturb the budgerigar eggs too often. The procedure for screening eggs is performed once with an interval of 4 or 5 days. Thus, you will minimize stressful situations for nesting birds, as well as the likelihood of damage to the eggs. The reason for unsuccessful masonry may be too frequent inspection.

The procedure should be carried out carefully and quickly (no more than 4 minutes), since a drop in temperature may adversely affect the development of the embryo in the egg. Take care to keep the room warm. In the daytime, conduct an inspection in a dark room, and in the evening do not turn on the light. Before ovoskopirovaniya must be well washed hands and wipe the parts of the ovoskop that come into contact with the egg. The egg is brought to the rack or gently turned, looking at the insides.

Ovoskopirovaniya should begin no earlier than 4-5 days nasizhivaniya eggs. Until this time, it is practically impossible to see anything in the egg, since the air chamber was not formed, the yolk tissue is very small, pale and mobile. Up to 4-5 days of incubation, it is not possible to distinguish between the shadow of the fetal membranes or the embryo.

Thus, we suggest checking eggs 3 times as follows.

The first test is 4-5 days - unfertilized eggs can be distinguished from fertilized eggs, in which the embryos are already well distinguished.

Ovoskopirovka eggs wavy parrots

The second check is 7-8 day incubation. In healthy embryos, allantois lines the entire shell inside the egg, covers all of the protein and closes at the sharp end of the egg. Sometimes there is a very small distance between its edges, which soon closes. The germ is large, dark. If the embryo is lagging behind in development, then the growth of allantois is also delayed. Near the sharp end of the egg, the border of the pink-colored allantois is visible, and light protein is seen at the sharp end of the egg. The germ is small.

The third check is 14-15 days of incubation. It is possible to detect eggs in which the embryos died after the second translucency, and to assess the course of development of the embryos in the second half of incubation. If the embryo is alive and develops normally, then it occupies almost the entire egg by the time of the third scanning. When mirage visible outlines and even movement. If the embryo is alive, but its development is delayed, then at the sharp end of the egg there is a bright transparent spot without blood vessels. The dead embryos appear when the eggs appear to be a dark, shapeless, fixed mass.

Signs of a healthy egg

The shell should be uniform, slightly rough, but at the same time relatively flat. The shell consists of 98% calcium carbonate and 2% of the salts of phosphorus, magnesium and organic matter that binds these salts. Shell minerals play a large role in the mineral metabolism of embryos. In the process of incubation, the calcium in the shell is used by the embryo to build the core. The thickness of the shell determines its strength. Outside, the shell is covered with a structureless layer of organic matter formed from mucus, which is the shell of the shell (cuticle). It plays an important protective role, as it is able to pass gases and water through its pores, but to retain microorganisms. Therefore, it is not recommended to wipe eggs or wash, since the destruction of the cuticle leads to the rapid infection of eggs and their deterioration.

Ovoskopirovaniya parrot eggs

The egg's air chamber is small in size and is located at the blunt end of the egg. At the blunt end of the egg, the shell is exfoliated, and an air chamber (pug) is formed. This occurs immediately after the egg is laid in the process of cooling and reducing the volume of its contents. The formation of the air chamber in the zone of the blunt end is due to the maximum porosity of this part of the shell. The air chamber of the egg plays a big role, providing gas exchange of the embryo during the transition to pulmonary respiration, that is, in front of the shell. Therefore, if the air chamber is displaced relative to the blunt end, the young growth dies during the transition to pulmonary respiration.

Yolk in the center or a little closer to the blunt end, blurred borders, there are no extraneous inclusions. The nutritional part of the yolk consists of the smallest grains - yolk balls. It contains almost all the necessary substances for the development of the embryo. At the beginning of the development of the yolk, the embryo consumes carbohydrates and proteins, and by the end - fats. Part of the yolk (up to 30%) is drawn into the abdominal cavity of the hatched young and is a supply of nutrients and biologically active substances in the first 3-6 days of life.