Question: How are children of more distantly related cousins affected?

What are the effects of having a child with your cousin?

First cousins are somewhat more likely than unrelated parents to have a child with a serious birth defect, mental retardation or genetic disease, but their increased risk is nowhere near as large as most people think, the scientists said.

Its estimated that 4 to 7 percent of children born from first-cousin marriages have birth defects, compared to 3 to 4 percent for children born from distantly related marriages. Thats not nothing, but its also not the end of the world—or the family tree.

What are the consequences of having parents who are closely related?

Dear Shibabrata Pattanayak , different studies revealed that children born from parents who were closely related increases the risks of having a baby with potentially life-threatening birth defects. Marrying within a family can lead to abnormalities in your future offspring.

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