Calving calendar and accurate calving table, calculator and pregnancy graph

The main event for the farmer is the arrival of the calf. To calculate the due date of the expected birth, the calving calendar of cows is usually used. To do this, you need to know the date of mating. An error of 10-14 days occurs because a pregnant cow carries a calf for 285-300 days. Knowing the estimated date of calving, the owner of the animal will have time to prepare and reduce the risk of problems associated with the birth of a calf.

Calving time after insemination

A cow walks pregnant for no more than 300 days. The approximate date of birth of a calf is calculated using the formula:

((fertilization day) +11) / (month number - 3) = (calving date)

Fertilization day - the day on which insemination took place, the day of pregnancy.

The month number is a sequential number (January is assigned one, February 2, and so on).

Calving date is the estimated birthday of the calf.

Numeric values ​​remain constant.

Calculation example:

The cow was inseminated on 4 May. When substituting the data into the formula, the following result is obtained:

(4 +11) / (5-3) = 15/2

The approximate calving date is 15 February.

If the amount exceeds the number of days in a month, then 30 is subtracted from it.

The cow was inseminated on 24 November.

(24+11) / (11-3) = 36 /8 = 6/8.

The approximate calving date is 6 August.

Cow pregnancy and calving calendar

After the cow is covered, her pregnancy is determined. There are special tests for this. They often give erroneous results. Therefore, livestock breeders schedule pregnancy. The date of possible insemination is recorded in it, the date of calving is calculated.

To determine the approximate date of birth of a calf, experienced farmers have created a pregnancy and calving calendar. By the date of fertilization, the term of the intended birth is calculated. Calculation by the formula in this case is not necessary.

Pregnancy calculator:

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The odd columns show the date of insemination by day and month. The even columns contain the date of the expected calving.

Calving calendar:

Fetal development

After a successful indiscriminate pregnancy comes. During this period, the cow's body goes through the following phases:

1. Embryonic phase. The fertilized egg attaches to the wall of the uterus.
2. Embryonic phase. The fertilized egg is introduced into the uterine wall, organs and systems are formed in the embryo.
3. Fruit phase. The placenta appears, body weight becomes larger, the fetus is endowed with functions.

The development of the embryo occurs gradually over 285 days:

1. In the first month, the organs of vision and the oral cavity are formed. The vascular network replaces the skin, gill slits appear. The weight of the embryo is not more than 1 gram.
2. After the second month, important organs of life appear. Active growth of the embryo is observed, the placenta is formed. The length of the embryo reaches 8 cm, and the weight increases to 30 grams.
3. From three to six months, the reproductive system, testes, and horns appear. The embryo turns into a calf. The length of the embryo reaches 45 cm, the weight is close to 4 kilograms.
4. Starting from the sixth month of pregnancy, wool actively grows, from the seventh month, internal organs and incisors appear.

After that, a calf is born.

What complications can there be

The health of a pregnant cow is monitored closely. A pregnant animal is vulnerable and susceptible to viral, fungal, bacterial infections. Proper care and nutrition reduces the risk of infection to a minimum. The heifers' food is enriched with useful minerals, trace elements and iodine. As a preventive measure, drugs "Alfort D3", "Sedimin", "Chiktonik", "Ivermek" are used. A consultation with a veterinarian is required. Skin parasites are etched with an antiseptic.

Bacterial infections in livestock are not uncommon. The main signs of the disease:

1. Refusal from chewing gum.
2. Diarrhea.
3. Stomach ache.
4. Rectal prolapse.

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For respiratory diseasesx paths, the cow has wheezing, fever, nasal mucus. You should be especially wary of clostridiosis and brucellosis. These infections are fatal to the animal. Complications of these infections are intoxication of the body, disturbance of the nervous system and miscarriage.