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Estrogen, shrubbery, and the sex ratio of suburban frogs

A new Yale study shows that estrogen in suburban yards is changing the ratio of male and female green frogs at nearby ponds. Higher levels of estrogen in areas where there are shrubs, vegetable gardens, and manicured lawns are disrupting frogs’ endocrine systems, according to the study. That, in turn, is driving up the number of female frogs and lowering the number of male frogs. Leer más.

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