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Tennessee legislature passes bill banning marriage between first cousins
(www.theguardian.com)
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this post was submitted on 12 Apr 2024
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It's a multigenerational issue with first cousin marriage. The coefficient of inbreeding increases as generations with repeated first cousin marriage.
Cultures where first cousin marriage is allowed have double the number of babies born with birth defects. They also are thought to have a higher rate of miscarriage.
Some insular small religious groups have an inbreeding coefficient so high that every marriage in the group is the equivalent to that of siblings. A small