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Ranchers.net

....and came across an interesting comment.

When fraternal twins are produced, one being female, it's estimated that 95% of those females are not fertile. :shock:

http://animalscience.ag.utk.edu/beef/pdf/NaturallyOccurringMultipleBirthsInCattle-FDK-2004.pdf

The pdf doesn't say anything about fraternal twins where both are female or conditions for identical twins as well.

Oh well, learn something new everyday. :D
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