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I think if you have twin heifers that they should be able to breed. You might have trouble with the heifer breeding if her twin was a bull. Then she is known as a free martin.

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> is it true that twin hiefers will
> not breed.if so why.

Twin heifers or twin bulls will not have any more trouble breeding than the average cow. However, if the twins are a bull and a heifer, the development of the reproductive organs of the heifer fetus are affected by the male hormones of the bull fetus and chances are greater than 90% she will be sterile. The bull calf should be normal.