Marrying Cousins
Question :

I understand that in Islam marrying cousins is not prohibited, but medical research has shown that sometimes genetic defects can occur more in such marriages in the future. Also, I have heard that there are some narrations from the Prophet (peace be upon him and his progeny) that advise Muslims from not marrying close relatives. Is this true?

Answer :

There is no specific narration that prohibits marriage between relatives. However, it might be recommended to avoid marriages among close relations in more than one generation.