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Science 16 March 1962:
Vol. 135. no. 3507, pp. 925 - 926
DOI: 10.1126/science.135.3507.925
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Articles

Tranquilizing Drugs and Pregnancy Tests in Male Batrachia

Miguel E. Bueno M. 1

1 Facultad de Medicina and Department of Obstetrics and Gynecology, Universidad del Valle, Cali, Colombia

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.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)