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If someone were offered a Shidduch with his first cousin, and she is 'right for him', should he take her, or would he have halachic or other reservations because she is his cousin?

  • Halachically it's not a problem, but there can be medical concerns of inbreeding. – Scimonster Aug 23 '16 at 10:20
  • I edited the question to depersonalize it and generalize it. As always if you don't like the edits, just edit it back. – mevaqesh Aug 23 '16 at 14:37
  • Not sure if it's legal by law, but by Torah yes. – ezra Aug 23 '16 at 22:06
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The question was asked of ynet Judaism.

הרב רונן לוביץ answered:

מבחינת ההלכה מותר לאדם להתחתן עם בת דודו או עם בת דודתו מדרגה ראשונה, וכל שכן מדרגה שנייה. ואכן, לא מעט נישואים כאלה היו בעבר, וישנם גם כיום.   לפי הידע המדעי, במקרה שיש נטייה למחלות גנטיות במשפחה, נישואי בני דודים עלולים להגביר את הסיכון להעביר את המחלה לילדים. לכן נראה לי שכדאי לבצע בדיקות של התאמה גנטית לפני כל נישואים של קרובי משפחה.

Jewish law allows a man to marry a first cousin and, even more so a second cousin. Indeed, there were few quite a few such marriages in the past, and there are still today.   According to scientific knowledge, where is a tendency to genetic disease in the family, marriage between cousins may increase the risk of transmitting the disease to children. Therefore it seems correct to make genetic tests before any marriage of relatives.

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    Many are of the opinion that it's appropriate to have genetic tests (at least, to some extent, i.e. Dor Yesharim) regardless of the relation of those marrying each other. – Salmononius2 Aug 23 '16 at 13:10
  • @Salmononius2 ... and I am one of the many! – Avrohom Yitzchok Aug 23 '16 at 13:53

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