Many of us, when purchasing chicken eggs, have noticed that sometimes there are double yolks inside the shells. In this regard, anxiety arises: why does such a phenomenon occur, is it possible to eat them, and also whether this is good or bad for our health. Let's look at all these issues together.
Double yolk eggs
Scientists have proven that double-yolk eggs are found in chickens of completely different breeds, and it is not difficult to distinguish them from standard single-yolk ones.
Did you know? In the “Book of Records of Russia” there is an entry from 2015, which concerns an ordinary chicken egg: its height was 8.3 cm and width - 5.7 cm. The owner of the record-breaking chicken that laid a giant egg is Alexander Sofonov from the Tver region.
How to distinguish
You can examine the testicle using X-ray through an ovoscope. But not everyone has this device. Therefore, you can make a simple comparison of the average dimensions and weight of a regular egg and a two-yolk one:
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In addition, double yolk eggs are distinguished by their slightly elongated shell shape. The color of the shell is not affected by how many yolks are hidden in it: double-yolk eggs are colored the same as regular eggs, according to the color of the chicken breed. 
Do chicks hatch?
In the egg industry, eggs with two yolks are not used for reproductive production, because experts consider them defective: usually one of the embryos necessarily dies, thereby poisoning its fellow. According to other studies, embryos do not develop from such testicles at all.
Although, according to reviews on farming forums, such cases occur, but very rarely. It can be assumed that if it were possible to breed two chickens from one egg, then scientists would have long ago tried to study the gene responsible for this phenomenon, and the production of twin chickens would have been put on stream. 
Is it possible to eat
According to experts, if a chicken that laid an egg with a double yolk was not stimulated with hormones, then such an egg can be eaten without harm to health. Today, testicles with this feature are in good demand among the population. All this is due to the fact that for the same price you can get larger eggs that do not differ in taste.
Reasons
These egg products can be produced by both healthy, highly productive, young laying hens and “aged” birds with some hormonal abnormalities or diseases. Let us list some reasons for this phenomenon.
Laying hen age
One of the reasons may be age-related changes in the bodies of chickens.
Video: why there are two yolks in eggs For example:
- A young chicken ovulates two eggs at the same time. In this case, the eggs, entering the upper part of the oviduct, are covered with one common shell thanks to the protein and shell glands.
- Double testicles are carried by a chicken that is in its young life cycle and is just developing its reproductive functions (the first few weeks of laying).
- The “old lady” hen lays double eggs, diligently performing her egg-laying function throughout her life, as a result of which the tone of her oviduct was reduced, and this became the cause of this pathology.
Important! It is necessary to pay attention to the health status of the poultry population. Typically, in sick laying hens that produce double-yolk eggs, the testicles also have other abnormalities: a thin or too strong shell,and alsocovered with stripes and irregularities.
Hormonal supplements
Another reason may be hormonal stimulants. Some producers use artificial stimulation of maturation and egg-laying processes with hormonal drugs in order to obtain a larger number of testicles.
Products produced using such stimulation may be hazardous to the health of consumers. And this is not good for the health of laying hens.
Important! The lighting in the chicken coop should be dim and turn on and off smoothly, otherwise bright and sharp flashes of light will make the chickens stressed and anxious, which will affect their egg production.
Inflammatory and hormonal diseases
Two yolks per egg are produced by sick birds or laying hens suffering from hormonal imbalances:
- Chickens that have ovulatory problems and inflammation of the oviducts (salpingitis). At the same time, they can lay not only eggs with double yolks, but also without yolks, as well as with defects, with blood clots. Sick birds should receive timely treatment and special care.
- The occurrence of hormonal disorders in young laying hens at the very beginning of egg laying, which causes a malfunction in the ovulatory processes. This can happen due to sudden changes in lifestyle: daylight hours have increased by several hours (over 15 hours) due to artificial lighting in the chicken coop, or chickens have been fed increased nutrition with premixes.
Is it good or bad
Such an interesting phenomenon as two yolks in one testicle should not be treated as an advantage. For poultry farmers who find eggs with such features in the nests of their hens, this should be an alarming signal. 
Although, as we have already figured out, in general such products are not dangerous, and they can be used in cooking, but this can be considered more of a disadvantage than an advantage.
Solving the problem
If your laying hens suddenly begin to produce eggs with two yolks, then in order to eliminate this problem, you must first establish the cause of this phenomenon:
- If very young hens begin to lay eggs with two yolks, and the reason for this was an artificial increase in daylight hours, lasting over 15 hours, then it is necessary to reduce the time indicator to a 12-hour daylight period. Then you need to gradually increase this time to the recommended 13-15 hours.
- If “older” hens begin to produce similar eggs, then this situation can only be corrected by a planned replacement of them with younger laying hens.
- In case of hormonal imbalances due to increased feeding of hens with specialized additives, it is necessary to exclude such feeds from their diet. Of course, one should not expect a rapid change in hormonal levels in chickens; they will still lay two-yolk eggs for some time. Their only difference will be safety for human health.
- In case of inflammatory diseases of the appendages, the presence of blood clots in the egg white, or a thin or uneven surface of the shell, it is necessary to consult a veterinary specialist who will examine the feathered patients and prescribe subsequent treatment for them.
Did you know? Domestic chickens are the most common birds on Earth.
As you can see, eating eggs with double yolks is not dangerous to health only if your blackfish are absolutely healthy and young, eat balanced feed and are kept in optimal conditions.
Since ancient times, an egg has been considered an unusual object with magical properties. Availability two yolks in one egg can be found extremely rarely, and there are many folk explanations for this phenomenon.
Basically, people interpret this phenomenon from a positive side.
The most famous sign in this regard is that if someone gets two yolks in an egg, then this person will soon be lucky in something, good luck awaits him. If such an egg falls into the hands of a young girl, then the signs indicate an imminent meeting of the groom and marriage.
And if a double yolk is a godsend for a married lady, then you can expect a new addition to her and her husband’s family, and there is a high probability that twins will appear.
Also, there are negative folk interpretations of this phenomenon. There is a sign that a double yolk symbolizes the arrival of rainy and stormy weather.
Why break an egg?
An egg broken by accident was not considered an accident by the people. The egg has always been considered not just a product, but a special symbol of life. Therefore, a broken egg has always been interpreted from a negative side. At the same time, the time of day when the egg was broken played a big role.
If this happened in the first half of the day, troubles can occur in any area (work, personal life, unsuccessful outcome of affairs), and if it was the second half of the day, then most likely the person who broke it will have to incur unreasonable material costs, or lose money.
It happens that an egg, while on the table, unexpectedly rolls off and breaks on the floor. This phenomenon is explained by the sign that the person who placed it on the table has enemies that he does not even know about and perhaps trusts them, considering them his friends. These friends-enemies can significantly harm or betray.
In case the egg broke on the way home from the store, this should be regarded as a sign that there are hidden problems in your personal life that you should think about.
As a magical symbol, the egg can be used to cause damage. If you find a broken egg in front of your door, then under no circumstances touch it until you pour it with holy water. Only after this can it be removed and thrown away immediately.
The sign about Easter eggs says that if the egg does not break on the first blow, this can be regarded as a symbol of health, prosperity and long life.
Other signs about eggs.
If a hen incubates an even number of eggs, one should be removed to avoid trouble.
Great happiness is coming if all the hatched chickens are cockerels.
Take care of the egg laid on Good Friday, it will give you the strength of all the chickens in the world combined.
Eggs intended for hen cannot be transported across the river, otherwise they will be empty.
According to Russian tradition, eggs should be carried in a hat so that the chickens are shaggy and have combs.
Eggs without yolks bring misfortune.
It is not good to bring eggs home after dark.
After eating an egg, crush the shell so that evil spirits do not use it for their machinations.
In some countries, they tell fortunes about their betrothed (betrothed) by choosing a yolk from a hard-boiled egg, filling the empty space with salt and eating the egg prepared in this way at night: the chosen one will be dreamed of.
Finally, in Japan there is a belief that if a woman steps on eggshells, she may go crazy.
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According to statistics, in poultry factories and farms the probability of an egg with two yolks is 1/1000. Apparently because of this rarity, people began to speculate on the significance of this event. But, despite the versatility of signs associated with a surprise in an egg, most of them still have only positive consequences, although not always, but more on that later.
Logical reasoning percentage
You can find a lot of different literature that talks about the characteristics of the chicken’s body. And most people believe that the problem is not in the bird itself, but in Belarus a special type of laying hen has long been bred, which is capable of regularly producing eggs with two yolks. It was enough to slightly change and increase the diet to constantly observe the rarest phenomenon in the world.
It also happens that an ordinary hen during the period of maturation faces a similar problem. This usually happens before the age of one year and lasts about a couple of months, after which the chicken’s body returns to normal, and it begins to bear the familiar ovoids with one yolk.
In rare cases, old chickens can also produce unusual surprise eggs. This phenomenon occurs due to a slowdown in the life processes of the bird’s nervous and muscular system.
What do folk signs say?
There are several interpretations of this event. In some cases, the role played by the fact who received the surprise gift. For example, if an unmarried single woman encounters two yolks in an egg, then folk wisdom predicts that she will soon meet her loved one and visit the registry office. And if the girl is already married, then an unexpected find indicates a replenishment of the family in the shortest possible time. And finally, for a pregnant representative of the fair sex, the egg will predict the possibility of having twins.
In addition, there are signs that are not related to a person’s gender or marital status. Thus, two yolks can change the life of the person who finds the egg, and the changes will only be positive. And if you believe the village predictions, then a pleasant find will bring good luck to the house.
There are also interpretations of signs in the world that predict undesirable events in the life of mankind, for example, changes in weather phenomena. It was noticed that in regions where seismic activity was recorded, shortly before the cataclysm, all chickens begin to lay eggs with two yolks. Perhaps it is for this reason that a new negative version of this sign has appeared among the people.
Two yolks in an egg: is it harmful or not?
Are the hens that lay them young or old?
Similar questions are asked by every person who, having decided to make scrambled eggs, discovered two yellow balls in the shell.
Let's figure out why this is so.
Once a day, a chicken produces one oocyte, from which one egg is formed. However, sometimes two oocytes mature, from which a two-yolk egg is formed. That is, according to the same principle as the birth of twins to a person.
True, there is one significant difference - there has never been a case where chicks hatched from such testicles and, most importantly, survived.
The ability to lay such eggs transmitted in chickens by inheritance.
In nature, the number of these testicles is less than one percent from the entire masonry.
Experts' opinions
However, if you sharply increase the daylight hours and the diet of chickens, then a failure occurs in the formation of albumen and yolk, oviduct peristalsis and ovulation. This helps the chicken begin to lay double-yolk eggs.Only young hens that have just begun to lay eggs lay their eggs naturally. This usually lasts a couple of months, then everything returns to normal.
Old hens may also have this ability if their oviduct tone is reduced.
Previously, when breeding chickens, such birds were immediately discarded. Eggs were used to prepare egg powder or melange.
Experts still believe that this product is a deviation from the norm and appears as a result of disturbances in the nutrition and maintenance of laying hens.
These eggs are in demand among producers and consumers as well, as they are 50% larger in volume than regular eggs and are not much more expensive. The shell of double-yolk eggs is thin and soft to the touch.
Manufacturers call such chickens highly productive.
Interestingly, these eggs are not regulated by GOST, but are not prohibited either.
Some experts also believe that producers add antibiotics and hormonal supplements to the feed in order to increase egg weight, the productivity of laying hens and reduce the cost of treating poultry. This negatively affects human health.
Whether this is true or not, the amount of chicken meat and eggs has become simply enormous.
However, no matter what we say, the standard and most useful ones are the small ones, with one yolk, which are laid by a young laying hen, preferably a domestic one.
Signs with a two-yolk egg
People would not be people if they had not come up with interesting and supernatural properties for such an anomaly.If there are two yolks in an egg, then an important event awaits you in life that will change your life for the better.
In the village there is a belief: if you come across such an egg, then good luck awaits you.
Alas, not all of them are so positive.
For example, it was noticed that in a seismically active region, before a large
Good day, poultry farmers and guests of our resource! The modern market never ceases to amaze us with engineering and scientific innovations. One of these new products can be considered the sale of eggs with two yolks. Why chickens lay double-yolk eggs is a question that interests not only people who are encountering this phenomenon for the first time. What to do if you come across eggs with two yolks?
People who are little familiar with breeding chickens say that she lays eggs with two yolks. In reality, this is not true at all. There are a number of reasons that explain this phenomenon. This will be discussed in the article.
Attention! Laboratory studies have shown that eating eggs with two yolks is safe if they are laid by a completely healthy laying hen.
Externally, the “curiosity” is no different from other testicles. has the same color and shape. The difference will be the weight - up to 110 - 120 grams and two yolks inside. Pronounced, multiple veins and blood clots indicate that the producer has this product.
There is an opinion that such a “phenomenon” brings poultry farmers two twin chicks at once, which is fundamentally wrong. Double-yolk eggs are not suitable for embryo development, scientists say.
If an egg with two yolks produced “twins,” scientists would work to identify the gene responsible for the mutation. The success of the enterprise is obvious.
What are the causes of double yolk eggs?
- Laying hen age. Choughs - old women who have diligently carried out the egg-laying function for several years - undergo changes in the hormonal structure, which leads to double yolk production. Also, very young chickens (up to a year) of breeds whose hormonal and physiological background has not been formed: 2 maturing cells end up in the reproductive system, surrounded by one protein and a shell.
- Hormonal supplements used by poultry farmers to stimulate growth lead to a similar pathology. There are two or three yolks under one shell - this is a deviation from the norm. Harm caused by hormones to the health of the laying hen is transmitted to the testicle, and with it to the person.
- Inflammatory diseases of the reproductive system lead to disruption of egg formation in the oviduct, resulting in paired yolks.
Interesting! Previously, eggs with a paired yolk were considered non-standard and sent for processing into egg powder - melange.
How to solve the double yolk problem
There is no unique solution to a specific issue. The answer is determined based on the reason. It’s a matter of age - wait for the young one to “grow up”, throw the old one into the soup. Treat diseases.
Restore hormonal imbalance. The health of the feathered worker depends on the conditions that you create.
Timely replacement of livestock, a competent approach to keeping and feeding chickens, especially in winter, is the key to success.
What to do to make a chicken lay normal eggs
- When a young black whale begins to lay non-standard eggs, reduce the daylight hours to 12 - 12.5 hours for a while, then gradually increase it to the normal regime. This will help improve the laying hen’s egg production and solve the problem of paired yolks.
- The “veterans” of egg production are sent to slaughter and replaced by young animals. There is no way to rejuvenate the quota.
- If the dysfunction is caused by taking hormones, remove them from the chicken’s diet and replace them with natural, fortified food containing the necessary nutritional components. In some cases, hormonal imbalance leaves an irreversible imprint on the health of the feathered beauty.
- Constantly monitor the health of the chickens if, in addition to paired yolks, there are other problems: streaks of blood in the contents, inflammation, changes in shell density. Call a veterinarian and examine the bird to determine a treatment strategy.
How to distinguish a double-yolk egg from a regular one
Nobody uses an ovoscope at home. There is a way to understand which instance is in front of you. Visually, a non-standard product is larger than its “relatives”, heavier in weight, and may be oblong in shape. The shell color characteristic of a particular breed is no different from one of the yolk shells.
Eggs with two yolks in industry
Poultry farms have appeared where, using hormones, mutations are caused in chickens that affect the formation of a non-standard egg product. The benefit is that there is more material available for processing into egg powder. The high demand for “mutants” is the second reason to “stuff” the duckbills with hormones.
There is little good in this: the duration of egg production is reduced, the difficulty of breeding healthy offspring is reduced to a minimum. However, the practice is common.
We hope we have answered the questions: why do chickens lay double-yolk eggs, is it dangerous for humans to eat them, which chickens lay “magic” eggs.