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A member asked:

What are the chances of having twins when there are none in the family?

A doctor has provided 1 answer

1/80 : The chance of non-identical twins is approximately 1/80 when there is no family history of twins. This increases to 1/58 if the mother has a family history. The frequency of identical twins is unaffected by family history and remains at about 1/250 pregnancies.

Answered 6/14/2013

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