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A member asked:
What are my chances of having twins if my grandma and grandpa on my fathers side are both twins?
2 doctors weighed in across 2 answers
1-3%: The average incidence of spontaneously conceived twins is 1%; with family history, it could be slightly higher. Other parameters to consider include race/ethnicity (rare in japanese, common in nigerians), weight/height of mother (obese, taller women at risk), use of fertility drugs!
Answered 12/9/2013
5.7k views
Increased: The question should ask about monozygotic versus dizygotic twins and the type of twins in other family members should be specified. Normally, the chance of twins is about 1 in 90 pregnancies that are delivered.
Answered 8/30/2012
5.7k views
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