dear doctor, i am arranging to marry my third cousin but i am worrying a lot about our futur babies,would they be healthy and safe from illmesses and complications considering that we have a lot of serious illnesses in our familly like diabetes,blood pressure,cancer,some physical deformation or mental diseases.i am going to make my decision according to your advice if i should marry him or not because to be honest i am not ready to have any ill or stupid babies with a low IQ. thank you