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<p>The Environment Agency (EA) has previously carried out an extensive research programme
into the feminising effects of hormones in treated sewage on wild roach populations
(<em>Rutilus rutilus</em>) (<a href="https://www.gov.uk/government/publications/the-identification-of-oestrogenic-effects-in-wild-fish).%20"
target="_blank">https://www.gov.uk/government/publications/the-identification-of-oestrogenic-effects-in-wild-fish).
</a></p><p> </p><p>In the autumn of 2019 the EA will be publishing the results of
research undertaken recently to investigate the current levels of feminisation in
similar fish populations, as a comparison to the previous study.</p>
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