Talk to Gynecologist on Czn Marriage

My yr pochhna chahti ho. Mera bhai hy jis ki shadi ham khala ki beti sy krna chahaty hy. Hamari mother ki shadi khandan sy bahir hoi hy. R khala ki shadi on k khandan my. But alhamdulillah khandan my koi b asi genitics ki bemari ni hy. R is sy phyly ksi bhn bhai ki shadi b khandan my nhi hoi. To kia hamy shadi sy phly test krwany chahey bhai k r czn k? Ya ksi ak k dono my sy. Ya na b krway to koi issuse nhi. Q k repeated marriage nhi hy. 1st hy. Agr krway to kon kon sy hony chahey. Plz guide kr dy