Answer:
I had a friend who was married to someone within his family and generally such marriages are termed as consanguineous marriage. The chances of the offspring inheriting genetic disorders from such marriages are quite high. infact my friend's baby was diagnosed of a disorder which led to mental disability at the age of 3. In these cases it's better to plan your baby, getting oneself and partner checked by a doctor and getting some pre-natal check from doctor. There are certain check ups even for the baby which can be done post delivery which will help in getting the baby diagnosed of any such genetic disorders right at the time of birth. Baby genetic screening for more than 100 disorders screens newborns for metabolic diseases.