Pollutants change 'he' frogs into 'she' frogs

Pollutants change 'he' frogs into 'she' frogs

PARIS (AFP) - Frogs that started life as male tadpoles were changed in an experiment into females by estrogen-like pollutants similar to those found in the environment, according to a new study.

The results may shed light on at least one reason that up to a third of frog species around the world are threatened with extinction, suggests the study, set to appear in the journal Environmental Toxicology and Chemistry in May.