Reproductive behavior and health in consanguineous marriages

@article{Bittles1991ReproductiveBA,
  title={Reproductive behavior and health in consanguineous marriages},
  author={AH Bittles and Wm. Clarke Mason and J Greene and Naropantul Appaji Rao},
  journal={Science},
  year={1991},
  volume={252},
  pages={789 - 794}
}
In many regions of Asia and Africa, consanguineous marriages currently account for approximately 20 to 50% of all unions, and preliminary observations indicate that migrants from these areas continue to contract marriages with close relatives when resident in North America and Western Europe. Consanguinity is associated with increased gross fertility, due at least in part to younger maternal age at first livebirth. Morbidity and mortality also may be elevated, resulting in comparable numbers of… 

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...

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TLDR
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