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A cow can only produce 1 calf per year. Normally on one calf is born per calving or birthing. Twins are quite rare, as they only occur in about 1:1000 births.

For cows that only live up to 5 years of age before they are culled or die of an illness, they have only given birth to 2 or 3 calves. For cows that are lucky enough to live up to, say, 25 years of age, they have been able to produce around 23 calves in their lifetime. The amount of time a cow can produce calves depends on how strong of a producer she is (the birth weights of the calves and the amount of milk she produces), her longevity, conformation and genetic structures.

A cow usually only has one calf at a time. Farmers sometimes prefer this, as it means the mother has less trouble supporting the calves both physically and nutritionally, before and after calving. Also, if a cow has twins of different genders, there is a chance that the female may be a freemartin. This means that because it may have been sharing a blood supply with its twin, it has had exposure to male hormones and may be infertile, or not able to become pregnant. While this may not be such a big issue for beef cattle, it is a huge problem for dairy cattle, as dairy cattle are bred for milk, which is only produced if a cow can become pregnant!

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7y ago

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