title: Vitamin B12 and potential fertility in male lactovegetarians.
mesh_terms: D000818:Animals; D002452:Cell Count; D014676:Diet, Vegetarian; D005298:Fertility; D006801:Humans; D007194:India; D008297:Male; D008892:Milk; D012661:Semen / Q000032:analysis*; D013091:Spermatogenesis / Q000187:drug effects; D013094:Spermatozoa; D014805:Vitamin B 12 / Q000032:analysis* / Q000097:blood / Q000627:therapeutic use
chemical_list: D014805:Vitamin B 12