Consanguineous marriage is still a preferred option in many societies of southern India. Therefore, this study addresses the state and district wise variation in consanguineous marriages and also attempts to find out the underlying factors of this practice in different marriage cohorts of South India. Drawing data from National Family Health Survey-4, the result revealed that there is a reduction in consanguineous marriages from 32.6% who married before 1985 to 23% during 2010–2014. About 13 districts in Tamil Nadu had the highest prevalence of consanguineous marriages, indicating that recent socio-demographic changes such as delays in age at marriages, lesser age gaps between partners, increase in the level of education, etc., did not explicitly affect the consanguineous marriages.

在印度南部的许多社会中，近亲婚姻仍然是首选。因此，本研究解决了近亲结婚在州和地区方面的差异，并试图找出南印度不同结婚队列中这种习俗的潜在因素。从《全国家庭健康调查-4》得出的数据中，结果表明，近亲结婚人数从1985年之前的32.6％减少到2010-2014年期间的23％。泰米尔纳德邦约有13个地区的近亲结婚率最高，这表明最近的社会人口统计学变化，例如结婚年龄延迟，伴侣之间的年龄差距缩小，教育水平提高等，并未明确影响到该地区。近亲婚姻。