Giving birth to a child is, perhaps, the most significant event in the life of almost any woman. Though today women often prefer to follow a career rather than give birth to children, the majority of young mothers state that it is a life-changing experience. Without a doubt, a beautiful healthy child is the most valued and loved living being for every mother. But, unfortunately, a certain percentage of children are born with different deviations, both physical and mental. In relation to this, a question arises: what causes mentally challenged children to be born?