title: Comparison of ammonium sulfate precipitation and resin adsorption methods for routine measurements of total urinary estrogens in pregnancy.
mesh_terms: D000327:Adsorption; D000645:Ammonium Sulfate; D011232:Chemical Precipitation; D004967:Estrogens / Q000652:urine*; D005260:Female; D006801:Humans; D007475:Ion Exchange Resins; D008722:Methods; D011247:Pregnancy; D011254:Pregnancy in Diabetics / Q000652:urine; D000644:Quaternary Ammonium Compounds
chemical_list: D004967:Estrogens; D007475:Ion Exchange Resins; D000644:Quaternary Ammonium Compounds; D000645:Ammonium Sulfate