Asslamaliakum my name is maqsood my sister marriage with maternal cousin she have two baby kid both have some problem they not growing properly blood & bone problem please give advised a best docter where we canfound please help us but I have question if god give the permission for marriage with causing why this problem again

Most recent research shows that marriage to cousins is not really that much of a larger risk. Most likely one of the two people has some family history of this and merely passed it along to their children.