Tranquilizing Drugs and Pregnancy Tests in Male Batrachia

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Science  16 Mar 1962:
Vol. 135, Issue 3507, pp. 925-926
DOI: 10.1126/science.135.3507.925


The reactions for the diagnosis of pregnancy by the use of urine from patients who are receiving tranquilizing drugs of the phenothiazine group have given false positive results when performed in the North American frog Rana pipiens. Such false positive reactions are not obtained when the South American toad Bufo arenarum is used.