These types of experiments have often been done using traditional embryological non-genetic model organisms, such as the chicken and African clawed frog.

Battelle, for example, is using eggs extracted from the South African clawed frog to test chemicals known to produce birth defects.

African clawed frogs lay eggs when they're injected with the urine of a pregnant human.

Wild-caught specimens found to have eaten clawed frogs, Xenopus, suggest a more aquatic nature than other species.

He described Xenopus laevis, the African clawed frog, for the first time in his doctoral thesis.

Between 1930 and 1960, female African clawed frogs were used as pregnancy tests.

African clawed frogs are often sold erroneously as African dwarf frogs.

The most famous member is the African clawed frog, or Platanna.

The African clawed frog (Xenopus laevis) responds to surface waves.

The only amphibians to bear claws are the African clawed frogs.