How do chickens lay eggs?
In birds, the process of egg formation occurs in a system that has been worked out by nature for millions of years. Wild birds that carry few eggs (only for the continuation of the genus), practically do not experience failures in the egg-laying mechanism. And in chickens, which the man has already turned into a kind of factory for the production of eggs, this function is often violated. After all, a pedigree layer hen can produce up to 300 eggs per year. How does the process of egg formation, how chickens carry eggs, and what functional changes occur in the body - this is the subject of our article.
How is the egg
To understand how a hen carries eggs, we’ll dwell on the physiology of the egg-laying. In the ovary of this bird there are many eggs, which are at different stages of development. Each egg cell is located in its own sheath - the follicle. After that, the yolk (mature egg), coming out of the follicle, falls into the oviduct. The movement of the mature egg through the genital tract takes more than 20 hours and begins to overgrow with protein and other membranes, regardless of whether the process of fertilization or not.
30-40 minutes after the chicken laid an egg, the next egg enters the oviduct. This is normal. But it also happens that two eggs arrive in the genital tract. If between their outputs there was a short period of time, then an egg with two yolks is formed. In the event that the output of the second yolk is postponed, then the first egg will come out in the shell, and the other - “naked”. This sign of egg-laying is inherited, but does not affect the quality of the product.
Unfertilized eggs (without an embryo) are called dietary, that is, chickens carry eggs without a rooster. The production of eggs at poultry farms is based on this physiological feature.
How old is the hen laying eggs? In chicken farms for the production of eggs are used, as a rule, no more than 2 years. The fact is that producing more than 250 eggs per year, the hen's body wears heavily, and it is no longer able to maintain high egg production. Some abnormalities can be explained by the high degree of intensive use.
- For example, it is considered commonplace if a young hen breaks the very first 10-20 eggs of a small size.
- Sometimes the chicken can carry a tiny egg that contains only protein. Such eggs are called fatty. They are obtained by chance, when a small clot of protein accumulates in the oviduct and is enveloped in the shell.
- Chickens carry eggs without shell - what does this mean? When birds start laying eggs in a soft shell or even in a leathery film, then it is worth saying that there is a clear deficit of phosphorus and calcium in the feed for such chickens. This deficiency is covered for some time by the trace elements of the bone tissue of chickens. But if time does not take action, it can lead to the death of the hens.
- In the ovary, the formation of eggs is regulated by hormones. If the hormones are disturbed, the sheath of the follicle may break too soon, so bloodstains may appear in the egg. Eggs with such anomalies can occur in chickens in stressful situations and some viral diseases. In such cases, it is necessary to improve the diet of the bird and its content. If this has no effect, then you should contact a veterinarian.