title: False-negative results with methylumbelliferylguanidinobenzoate reactive proteases in cystic fibrosis pregnancies.
mesh_terms: D000649:Amniocentesis; D000653:Amniotic Fluid / Q000201:enzymology; D004796:Clinical Enzyme Tests; D003550:Cystic Fibrosis / Q000175:diagnosis*; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D006923:Hymecromone / Q000031:analogs & derivatives; D010447:Peptide Hydrolases / Q000032:analysis*; D011247:Pregnancy; D011248:Pregnancy Complications; D011296:Prenatal Diagnosis; D014468:Umbelliferones
chemical_list: C017532:4-methylumbelliferylguanidinobenzoate; D014468:Umbelliferones; D006923:Hymecromone; D010447:Peptide Hydrolases