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  1. Sterilizing a man or animal is Biblically forbidden. [1] Sterilizing a woman is also forbidden.[2]
  2. Using a medicine to sterilize a man or animal is forbidden.[3]


  1. Vayikra 22:24, S”A EH 5:11
  2. Rambam Isurei Biyah 16:11, Shulchan Aruch EH 5:11. Gra EH 5:25 implies it is biblical without malkot. Perisha 5:30 explains that the reason it is forbidden to sterilize women is because they won’t be able to populate the world (lo tohu l’shevet yetzara) which also applies to women.
  3. Gemara Shabbat 110b, Shulchan Aruch EH 5:12