title: A non-operative procedure to induce male sterility.
mesh_terms: D000328:Adult; D000431:Ethanol / Q000008:administration & dosage; D005557:Formaldehyde / Q000008:administration & dosage; D006801:Humans; D008297:Male; D008875:Middle Aged; D013245:Sterilization, Reproductive / Q000379:methods*
chemical_list: D005557:Formaldehyde; D000431:Ethanol