The African clawed frog has been a significant subject in scientific research due to its unique features and adaptability. Initially used in pregnancy tests, these frogs provided a reliable method for detecting HCG without harming the animals. Their widespread use in laboratories contributed to numerous studies, including developmental biology. However, their introduction to non-native environments led to ecological issues, as they became invasive species and carriers of a deadly fungus. Despite their contributions to science, the ethical and environmental concerns surrounding their use remain significant.

Discuss the impact of African clawed frogs on pregnancy testing in the 1970s.

What are the ecological concerns associated with the African clawed frog as an invasive species?