A member asked:

I have uncles's daughter(uncle is my mother's own brother) to get married. how much (percentage wise) chances of unhealthy children?any tests to know?

A doctor has provided 1 answer

Doubles defects: Marriage between first cousins doubled the risk of birth defects from 3% to 6% in a study of Pakistani children.

Answered 9/2/2014

3.7k views

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