4 articles
Consanguinity
Consanguinity (close-kin marriage, second cousins or closer): about 10.4% of the global population; first-cousin unions carry an inbreeding coefficient of 1/16 and roughly double congenital disorder risk, with practice concentrated in MENA and South Asia.
Cousin marriage
Cousin marriage, or consanguineous marriage, is marriage between cousins, typically first cousins. Legal in most of the world, banned in many US states; raises autosomal recessive disorder risk roughly twofold.
Cousin marriage in the Middle East
Cousin (consanguineous) marriage in the Middle East: unions between second cousins or closer (F ≥ 0.0156), reaching 20–70% of marriages in Arab countries, driven by property retention, education, and rural residence.
Cousin marriage law in the United States
US state statutes restricting or banning first-cousin marriage, with the federal government silent: 22 permissive states, 6 conditional, and 22 bans since Kansas's first in 1858.