WORK . . Environmental Research Foundation . . P.O. Box 5036, Annapolis, MD 21403 . .
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To subscribe, E-mail the words . . In the early 1990s, British researchers at Brunel University in Uxbridge noticed that male fish living downstream from a sewage treatment plant near London had testes laden with eggs. Vitellogenin is the protein responsible for making egg yolks in female fish. Every sewage treatment plant in England caused the estrogenic effect. It took only 2 to 3 weeks for the vitellogenin to begin to appear in the blood of caged trout.