Hereditary diseases are difficult to cure. Antithrombin-III from transgenic goat milk and III C12 esterase inhibitor drugs from transgenic rabbit milk have been produced by recombinant DNA technology. Antithrombin-III drugs are used in the treatment of human antithrombin deficiency and III C12 esterase inhibitor drugs in the treatment of human angioedema. Efforts are underway to eradicate hereditary diseases by discovering more drugs through this technology. Transgenic animals are used as bioreactors to produce drugs from their milk, blood and urine. This is called molecular farming. These medicines are used to cure many diseases.