Pre-production period of livestock is calculated

When farmers raise livestock, sometimes they do not know the due date of the livestock, and when they arrive at the farm, they are in a hurry because of not preparing in advance, and some even cause the death of the livestock. To this end, several methods for predicting the expected date of livestock production are briefly described as follows:

Pigs: An average of 114 days (110-118 days) of sow pregnancy. The estimation of the expected date of birth is the "3, 3, 3" method, ie, from the date of sow mating, push back 3 months plus 3 weeks plus 3 days, which is the expected date of production.

Sheep: The ewes have an average of 150 days of gestation (144-152 days for sheep and 147-155 days for goats). The expected date of production is: plus 5 for breeding months.

Cattle: An average of 280 days (270-285 days) of pregnancy for cattle. The forecast method for the expected date of production is: Monthly decrease 3, Daily increase 6. That is, the cow's breeding month minus 3 and the breeding day's plus 6, is the date of its pre-production. Cows have the same date as the cattle.

If the breeding months are not sufficiently reduced in January, February or March, you need to borrow one year (that is, plus 12 months) and then subtract. If the breeding days add six months or more, subtract this month. The number of days, plus 1 in the month.

For example, a cow was fertilized on February 29, 2000. It is expected that the date of calving is 2+12 (by one year) -3=11; the date is 29+6-30=5; and the month is followed by 1, that is, December. The expected date of production is December 5, 2000.

Buffalo: The average buffalo's gestation period is 330 days (320-348 days). The forecast method for the expected date of birth is: month minus 1, day plus 2. If the month is January or day plus 2 after more than 1 month, the treatment is the same as that of the cattle.

Horse: Mare's gestation period averages 340 days (330-350 days). The forecast method for the expected date of production is: month minus 1 and day plus 1.

Other livestock. The expected date of production of other livestock is also calculated from the gestation period and mating date. Of course, the estimation method can also be summarized. Several gestation periods common in other livestock are as follows: donkey 360 days (350-365 days), cats 63 days (60-66 days), dogs 60 days (58-64 days), rabbits 30 days (29-31 days) .

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