title: Evaluation of four slide test kits for the detection of human chorionic gonadotropin in urine.
abstract: Three "indirect-type" slide tests utilizing the principle of hemagglutination inhibition and one new "direct-type" slide test employing direct agglutination were evaluated for their sensitivity in detecting human chorionic gonadotropin (HCG) in urine. The results of positive tests in a group of woman in very early pregnancy were correlated with the "days after last menses". In this series the direct slide test was the most accurate. A control must be used with each direct test to indicate interfering substances and when such are present a different test must be used. All tests were found to be of the relative sensitivity stated by the manufacturer.
mesh_terms: D006063:Chorionic Gonadotropin / Q000652:urine*; D005069:Evaluation Studies as Topic; D005188:False Negative Reactions; D005260:Female; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007841:Latex Fixation Tests; D008722:Methods; D011247:Pregnancy; D011259:Pregnancy Tests, Immunologic / Q000592:standards*; D013046:Specific Gravity; D013997:Time Factors
chemical_list: D006063:Chorionic Gonadotropin