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Fish exposed to estrogen produce fewer males

Water tainted with even a small concentration of human hormones can have profound effects on fish, according to a University of Cincinnati biologist.

Video: The chemistry of gender transitions

With Caitlyn Jenner's recent transition in the news, more attention is being paid to the transgender community. A big part of gender transition is hormone replacement therapy (HRT).

Urban fish masculinized by hormone-mimicking chemicals

(Phys.org) —It's a man's world for fish in a San Francisco Bay-Delta estuary. Silverside fish collected from an urban beach in Suisun Marsh were more masculinized, but with smaller and less healthy gonads, than were neighboring ...