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African clawed frog. The Hogben test, named after the British zoologist Lancelot Hogben, was one of the most reliable and rapid pregnancy tests from the 1940s to the 1960s. [6] The urine samples were injected into African clawed frogs. The Hogben test uses female frogs, unlike the Galli-Mainini test which uses male frogs.
The African clawed frog or platanna, Xenopus laevis, was first widely used in laboratories in pregnancy assays in the first half of the 20th century.When human chorionic gonadotropin, a hormone found in substantial quantities in the urine of pregnant women, is injected into a female X. laevis, it induces them to lay eggs.
This test, known as the frog test, was used throughout the world from the 1930s to 1960s, with Xenopus frogs being exported in great numbers. [38] [39] Shapiro's advisor, Lancelot Hogben, claimed to have developed the pregnancy test himself, but this was refuted by both Shapiro and Zwarenstein in a letter to the British Medical Journal.
A biological monitor or biomonitor is an organism that provides ... (frogs and toads), are ... Benthic indicators are the most frequently used water quality test ...
Squish is a commercial cross-platform GUI and regression testing tool that can test applications based on a variety of graphical user interface (GUI) technologies (see list below). It is developed and maintained by Froglogic. [1] [2]
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A FrogWatch is any of several citizen science programs in which laypeople monitor amphibians. In a FrogWatch, people make recordings of frogs and other animals that live near them and send the recordings to databases for scientists and other people to hear and study. Not all FrogWatch programs are run by the same people.