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A Rapid Test for Pregnancy on Xenopus lævis


IN a recent communication Bellerby (1933)1 has shown that injection of acid or alkaline extracts of bovine anterior lobe of the pituitary gland into female South African clawed toads (Xenopus Iœvis) produces extrusion of ova through the cloaca within 18 hours.


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  2. Zondek, B., Klin. Wochenschr., 9, 964 ; 1930.

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  3. Zwarenstein H., and Shapiro H. A., J. Exp. Biol., 10, 372 ; 1933.

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  4. Bellerby, C. W., private communication (1933).

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SHAPIRO, H., ZWARENSTEIN, H. A Rapid Test for Pregnancy on Xenopus lævis. Nature 133, 762 (1934).

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