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From Mount Sinai Hospital and the Minneapolis Teenage Medical Service, Minneapolis, Minnesota.
Address reprint requests to Charles A. Horwitz, MD Associate Pathologist Mount Sinai Hospital 2215 Park Avenue Minneapolis, MN 55404
A new formulation of a latex agglutination-inhibition slide pregnancy test (Pregnosis® was evaluated over a 21-month interval. Test accuracy was 95.4% in 1464 uncomplicated pregnancies. No false positives were recorded on 1287 routine specimens, and we were unable to demonstrate test interference on selected material with metabolites of methadone, phenothiazines, psychotropic drugs, morphine or codeine, and oral contraceptives. The main advantage of this test is its relative specificity.
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