“Before, we knew we got fewer males than we should have, and we got hermaphrodites. Now, we have clearly shown that many of these animals are sex-reversed males,” Hayes said. “We have animals that are females, in the sense that they behave like females: They have estrogen, lay eggs, they mate with other males. Atrazine has caused a hormonal imbalance that has made them develop into the wrong sex, in terms of their genetic constitution.” …
“What people have to realize is that, just as with taking pharmaceuticals, they have to decide whether the benefits outweigh the costs,” he [Dr Tyrone B. Hayes] said. “Not every frog or every human will be affected by atrazine, but do you want to take a chance, what with all the other things that we know atrazine does, not just to humans but to rodents and frogs and fish?” …
External links:
- ABC Science: Weedkiller ‘makes boy frogs lay eggs’
- Atrazine Lovers - the website of scientist Tyrone B. Hayes PhD
- Australian Pesticides and Veterinary Medicines Authority (APVMA), Australian Government: New U.S. EPA Review of Atrazine
- CSIRO: Bug Puts the Bite on Pesticide Problem
- Friends of the Earth Australia: Atrazine expert to visit Australia



