In Pakistan marriages within relatives and cousin is very common and widespread, in rural areas this is norm and if anyone wants to get married outside the tribe then it is considered a taboo thing.
But doctors believe that if relatives are getting married then they should at least check their blood samples because the risk of many diseases such as mental disorders and thalassemia is increased among marriages among cousins.
On the other hand if marriage is outside the tribe then the risk is decreased and it the chances are that the children born will be more healthy. It is also believed that this will also help in covering the deficiencies of the parent from common into child, if they have any.
