The Reliability of the Male North American Frog (Rana pipiens) in the Diagnosis of Pregnancy

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Abstract
WITHIN the past two years many reports summarized by Galli–Mainini1 have appeared describing a new technic for diagnosis of pregnancy utilizing male amphibia. A great many species of frogs and toads have been described as useful for this procedure, and it is highly probable that many varieties of amphibia have equal value. At the present time two species have received the greatest attention. Galli–Mainini,2 working in South America, has used a toad indigenous to that area—the Bufo arenarum. His recent report on the results of approximately 1000 tests using this amphibian indicates a high degree of accuracy, approximately 98 . . .