title: Letter: Effect of urobilinogen on urinary estrogen determination.
mesh_terms: D004967:Estrogens / Q000652:urine*; D005260:Female; D006801:Humans; D011247:Pregnancy; D014558:Urobilinogen / Q000652:urine*
chemical_list: D004967:Estrogens; D014558:Urobilinogen