Up to a Quarter of Non-Western Immigrants Marry Within Family

The National Institute for Environmental Hygiene (RIVM) has investigated the high percentage of infant mortality in Rotterdam. It concluded that this is related to the fact that many non-Western immigrants marry within their own families. Up to 25% of Turks in the Netherlands and 20% of the Moroccans have done so, which causes far more genetic problems than are common in the general population, where only about 1 per thousand would marry within his own family.
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