Any cow in front of the hotel needs care and increased attention from the owner. You need to understand what symptoms are harbingers of imminent labor, to prepare the animal and provide him with comfortable conditions. It is not necessary to have a veterinary education to determine the signs of approaching calving. The animal's behavior changes, external changes are observed: the back is arched, mucus flows from the vulva, and the lengthened lobes can become very plentiful. Let us dwell on this in more detail.
External changes chicks
The first external signs of calving help to understand that the pregnant cow will soon give birth. Regardless of whether the animal is milked before giving birth, its udder is poured and swells strongly. You need to watch him to prevent the appearance of inflammation. With a pathological change in the state of the udder (the appearance of wounds, bleeding), it is necessary to turn to a veterinarian. Otherwise, the first milking will be painful regardless of how many days have passed after giving birth.
Farmers who do not understand how to know about the approaching calving, you need to look at the vulva. It swells, and around the set of folds. The definition is possible and the allocation of it - this is the surest sign. They are colorless and have a consistency of mucus. Thanks to this discharge, friction is reduced during labor and the process itself is noticeably easier.
Even if there is a delay in calving, the pelvic bones of the animal begin to expand, and the base of the tail descends. In addition, the sides are lowered, and the back of the stomach looks larger than from the side of the muzzle. Another sign is the waste water from the fetal bladder. It is a pouch protruding from the vulva. He appears earlier than the calf.
So how to determine the sex of the future calf with high accuracy is possible only with ultrasound, then pay attention to a special feature that works in some cases. If the udder swells from the posterior lobes, a bull will be born, from the front - a heifer.
Behavior of an animal before calving
Before calving, the cow's behavior changes, so it is easy to determine the approach of labor. The animal is afraid of extraneous sounds, very nervous. This can lead to the fact that the cow calves later, and the birth of calves (especially twins), will be unfavorable. If the cattle goes over the term even for 1 day, an urgent need to call the veterinarian to tell him what to do.
A few days before giving birth the cow loses its appetite. By these signs it can be understood that calving will begin soon. Burenka does not touch the hay, drinks little water or refuses it altogether. Sometimes during labor she starts kicking the stomach, which can negatively affect childbirth. In this case, the best thing to do is contact your veterinarian. It is unlikely that every farmer can say to himself: "I know everything to the smallest detail and I can save the cow that was cast off."
What happens before calving
During the day, the udder of the heifer begins to fill with colostrum. It looks as if the animal urgently needs to be milked. A female pregnant with a calf becomes very aggressive. She can rush on other animals if she feels the slightest danger from their side. Therefore, as long as the heifer is not calved, in no case can one bring it to pasture and leave it unattended. Burenka can begin to pick up hay, making a "nest". She does not need to interfere.
On the day of calving, cows start to behave differently than usual. They keep away from people and fellow tribesmen, move their ears intensely, arch their backs, constantly shudder, walk slowly around the stall, look around. The reasons are simple: the calf will soon appear, and the animal feels the end of pregnancy. If there are similar signs, you need to decide what to do when the cow calves and be fully armed.
Initial stage of pregnancy
We found out what external signs appear in a cow before calving, now let's talk about the development of the fetus by months. For inexperienced farmers, the question often arises how long a pregnancy can last in cattle (cattle). This period always lasts 9 months. First begins the division of the zygote, which is in the fluid of the oviduct, after which the embryo moves into the uterus. A germinal node appears here, a trophoblast is being tabulated. This period (second) lasts about 7 days.
Some farmers believe that if they are not pregnant, they can still be milked at this stage, but this is not true. It is better to carry out milking already calving the cows, because during pregnancy they need strength to bear the fetus.
At the third stage, the embryo is located in the uterine horn fluid, and the embryonic membrane begins. This period lasts no more than 8 days. At the onset of the fourth stage of development, the fetus already has a circulatory system, a nervous system appears, and axial organs. The fifth stage leads to the laying of muscles, kidneys, liver, intestines.
The final stage of the development of the calf
At the sixth stage, the formation of organs and systems comes to an end, and the catididones appear. The period lasts about 7 days. At the seventh and eighth stage, it takes 25 days - the laying of the mammary glands, genitals takes place, cartilage and bone skeletons, muscles appear. At this stage, the body of the fetus is already covered with the first, but not yet thick, hair. In the last 2 months of prenatal development, a particularly rapid absolute weight growth has been observed.
In the last quarter of pregnancy, at least 2/3 of the calf's live weight increases. The ninth stage is characterized by ready wool coat, pedigree attributes. Absolute body size greatly increased.
By 9 months, the weight of the fetus is more than 60 kg, so the first signs of calving the cow appear. It becomes difficult for her to carry the fruit, the animal quickly gets tired, and avoids its fellow tribesmen. Often, for this period, cows increase their appetite, they eat a lot of sauerkraut, which contains a large amount of vitamins. The longer the period, the more pronounced the signs of the approaching calving. Detailed development of the fetus of the cow for months is presented in the table.
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