Consanguineous marriage: Does it cause genetic abnormalities?

Consanguineous marriage, the union between closely related individuals, has been practiced for generations across various cultures. While providing social cohesion, it also raises significant genetic concerns for offspring.

The primary concern with consanguinity is the increased risk of autosomal recessive disorders. Everyone carries a few recessive mutations that don't affect their health because they have a second, healthy copy of the gene. However, when two relatives have children, they are more likely to both carry the same recessive mutation inherited from a common ancestor.

Increased Risk

While the risk of birth defects in children of unrelated parents is about 2-3%, this risk increases to about 4-6% for children of first cousins. While the vast majority of children from consanguineous unions are born healthy, the risk of rare genetic conditions is undeniably higher.

Prevention and Counseling

Genetic counseling and carrier screening are essential for couples in consanguineous relationships. By identifying shared recessive mutations, healthcare providers can offer informed reproductive choices and early intervention strategies, significantly reducing the burden of genetic disease.