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There are really two ways to tell if a cow (or heifer) is a virgin or not. One is by the size of the vulva, and the other by the udder and teats. A virgin cow (a female that has already reached adult maturity at around 3 years of age) that is not pregnant or has never been bred will have a smaller vulva and almost no udder (except for four small teats between the legs).

Cows that are not virgins will have a larger, more defined udder and teats and a larger vulva. The reason this is so is because, with the udder, milk needs to be produced in order to raise a calf. Mammary glands in cattle are only developed when the cow or heifer is pregnant: growth of teats also occur to allow for a "better grip" for a calf to suckle on. As for the vulva, they are larger in "experienced" or non-virgin cows because they have been stretched out from having to pass a calf through the birth canal. This stretching is the same in women, and is the very reason why heifers and women who give birth for the first time find it more difficult (and more painful) to give birth than those who have given birth before.

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13y ago

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