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Not common but certainly not unknown. We all ovulate monthly, usually from alternating ovaries. Some months, each ovary releases an egg. If we have multiple partners during this time, each egg released can be fertilized separately and then develop as fraternal twins. Identical twins come from a division in one one fertilized egg.
It is kind of a soap opera scenario but any of us who have too many dates in one day actually run this risk. Not a few women have taken this risk, hopefully with protection and a good cleansing in between.
In cats, many litters have multiple fathers. The cat uterus has two branches called horns where the kittens develop. The eggs in each horn can be fertilized by successive partners - common in cats.
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Brandye
Don't wear cheap bras!
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