Proc Natl Acad Sci U S A May 2007 PMID 17517636

Collapse of a fish population after exposure to a synthetic estrogen.

Karen A Kidd, Paul J Blanchfield, Kenneth H Mills, Vince P Palace, Robert E Evans, James M Lazorchak, Robert W Flick

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Mentions

105
Peak: 3 in Aug 2025
across 5 sources since Jun 2022

Extended reach

59,533
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565

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Jun 2022 – Oct 2025

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AI synopsis

What people are saying

The discussions demonstrate a strong consensus supporting the research, often emphasizing how low-level exposure to synthetic estrogens can lead to fish population collapse, with phrases like 'ecological disaster' and 'endangerment of wildlife' showing concern. The tone is serious and urgent, reflecting a belief in the real-world importance and potential consequences of these findings.

AgreementStrong agreement

Most discussions recognize and support the findings of the article, emphasizing the dangers of synthetic estrogens on fish populations and linking them to broader environmental and health concerns.

InterestHigh interest

Posts show high engagement with the topic, with some questioning and discussing the implications, indicating a strong interest in the environmental impact and potential societal consequences.

EngagementHigh engagement

Many discussions include references to scientific studies, predictions about future impacts, and calls to action, reflecting deep engagement and critical analysis.

ImpactHigh impact

The discussions highlight concerns about ecological collapse, human health, and policy implications, suggesting that the publication has significant potential to influence public opinion and policies.

Abstract in brief

  • A 7-year lake experiment showed that low-level exposure to the synthetic estrogen 17 alpha-ethynylestradiol (EE2) caused feminization and reproductive disruptions in fathead minnows, ultimately leading to their near extinction.
  • Male fish exposed to estrogenic substances produced vitellogenin, a protein typically only made by females, indicating feminization and hormonal imbalance.
  • These findings suggest that common estrogenic contaminants in wastewater can threaten the long-term survival of wild fish populations by disrupting their reproductive health.

Top posts

Most liked on X and Bluesky
Javi Ciborro
@papayaykware · X

@magikingafro @elzorrotacneno https://t.co/5M8YW1XKIi Colapso de una población de peces después de la exposición a un estrógeno sintético

Aug 23, 2024 · 6 likes · 8,028 followers View post →
AB Municipal Watch
@ABMWatch · X

@HockleyTyson The Pill. An experiment on humanity of epic proportions. In the early stages we are all female until the Y exerts itself & testosterone begins being processed. Free estrogens put into our water table by 100s of millions of women have been catastrophic. https://t.co/4r8IMHJPrA

Mar 18, 2024 · 4 likes · 235 followers View post →
Patrick Hamilton
@patbhamilton · X

The big question that has kept people awake is if estrogen pollution will harm populations. In a famous paper, Canadian researchers dosed a whole lake with ~5ng/L ethinylestradiol for 3 years the fathead minnow population collapsed! https://t.co/cC6U6DuxL0

Jun 24, 2022 · 1 like · 1 share · 4,722 followers View post →
Joe B
@JBianco215 · X

https://t.co/WyA3Cl2eeU Chronic exposure of fathead minnow to low amounts of the estrogen medication 17α-ethynylestradiol led to male feminization, altered gonad development, altered female oogenesis, and near extinction of the species from the lake.

Nov 12, 2022 · 1 like · 1 share · 4,568 followers View post →
Hilary Chelminski
@ChelminskiH · X

Collapse of a fish population after exposure to a synthetic estrogen | PNAS https://t.co/X4BmQh58GA

Aug 18, 2025 · 1 like · 1,616 followers View post →
The Wrecking Ball
@KetriMarie · X

@DOGEQEEN There's no such thing as mental illness bc the brain is part of the body. This is likely caused by endocrine disruptors in food, water, carpet, Rx, etc. Read about the impact on fish. We are not immune. https://t.co/VlHqRfVojl

Aug 27, 2025 · 1 like · 1,136 followers View post →

All mentions

triz!! ⭐️
@hibiscustotriz · X

Fontes: Kidd et al. (2007). "Collapse of a fish population after exposure to a synthetic estrogen." Proceedings of the National Academy of Sciences. Estudo antigo mostra que a exposição crônica ao etinilestradiol em um lago levou ao colapso populacional de um peixe.

Oct 27, 2025 · 40 followers View post →
Asphalt Vision
@kommonManIndia · X

@jeancultamerre @RichiesPolitics @LavanyaBallal 2/n Stop acting like you’re from Greenpeace when you only care about likes. Collapse of a fish population after exposure to a synthetic estrogen https://t.co/JVpGkGDHj0

Sep 22, 2025 · 239 followers View post →
The Wrecking Ball
@KetriMarie · X

Transgenderism is most likely caused by synthetic estrogen in the water. Look what it's doing to fish. We are not immune to this. Birth control pills need to be banned immediately. https://t.co/VlHqRfVojl

Aug 27, 2025 · 1,136 followers View post →
The Wrecking Ball
@KetriMarie · X

@DOGEQEEN There's no such thing as mental illness bc the brain is part of the body. This is likely caused by endocrine disruptors in food, water, carpet, Rx, etc. Read about the impact on fish. We are not immune. https://t.co/VlHqRfVojl

Aug 27, 2025 · 1 like · 1,136 followers View post →
Hilary Chelminski
@ChelminskiH · X

Collapse of a fish population after exposure to a synthetic estrogen | PNAS https://t.co/X4BmQh58GA

Aug 18, 2025 · 1 like · 1,616 followers View post →
VincitOmniaVeritas ✴️
@V_omnia_V · X

@CuriousReality1 @HazelAppleyard_ This is complicated, but there is substances in the environment (synthetic estrogens and phtalates mostly) that are capable of feminizing fish in the ocean and rivers. Look into it. RFK Jr. Talked about it. There is studies on it. https://t.co/Fva8xtKhif

Feb 5, 2025 · 1,839 followers View post →
dyeman
@MasterDyer007 · X

@ASFleischman These children have been exposed to mostly manmade estrogen and androgen mimics and antagonists! Do you really think these chemicals only effect fish? https://t.co/kVZD6AYPju

Dec 6, 2024 · 2,015 followers View post →
Javi Ciborro
@papayaykware · X

@magikingafro @elzorrotacneno https://t.co/5M8YW1XKIi Colapso de una población de peces después de la exposición a un estrógeno sintético

Aug 23, 2024 · 6 likes · 8,028 followers View post →
dyeman
@MasterDyer007 · X

@Esqueer_ I think Trans is not the natural state of being. I think people who suffer from sexually dysphoria have been exposed to estrogen mimics! Why were we so arrogant to think this would only happen to fish & not our children?!?! https://t.co/mOzIgHk8mv

Jul 23, 2024 · 2,015 followers View post →
dyeman
@MasterDyer007 · X

@OliLondonTV We celebrate mental illness brought about by estrogens and estrogen mimics that are known to affect the reproductive health of wild fishes! We are doing arrogant we thought these chemicals would only affect fish? https://t.co/mOzIgHk8mv

Jul 12, 2024 · 2,015 followers View post →
AB Municipal Watch
@ABMWatch · X

@HockleyTyson The Pill. An experiment on humanity of epic proportions. In the early stages we are all female until the Y exerts itself & testosterone begins being processed. Free estrogens put into our water table by 100s of millions of women have been catastrophic. https://t.co/4r8IMHJPrA

Mar 18, 2024 · 4 likes · 235 followers View post →
milkthistled
@milkthistled · X

@Kathy_and_co @IsabellaMcnone @MeasuredAndSlow @Maggie_Rawr Again, the disposable product argument is irrelevant because you don’t have to use them. Reusable pads/tampons, period panties and rubber cups exist. https://t.co/vY0HLPktZY

Jan 19, 2024 · 3,968 followers View post →
Poet Influencer Class Enemy
@fartinganus · X

@default_friend Multiple studies have concluded that BC in water supply contributes to occurrence of intersex fish. Yes atrazine is bad too. https://t.co/Wrm7LsdPTp xenoestrogens and natural estrogens from a wide array of man made products are biologically active and pervasive in water supply.

Jun 11, 2023 · 71 followers View post →
Wolfey102
@Wolfey102 · X

RT @JBianco215: https://t.co/WyA3Cl2eeU Chronic exposure of fathead minnow to low amounts of the estrogen medication 17α-ethynylestradiol…

Nov 17, 2022 · 1 share · 685 followers View post →
Joe B
@JBianco215 · X

https://t.co/WyA3Cl2eeU Chronic exposure of fathead minnow to low amounts of the estrogen medication 17α-ethynylestradiol led to male feminization, altered gonad development, altered female oogenesis, and near extinction of the species from the lake.

Nov 12, 2022 · 1 like · 1 share · 4,568 followers View post →
asiboi
@asiboi2 · X

RT @Vertumne1: Source: https://t.co/arMVBSQnIB

Sep 1, 2022 · 1 share · 58 followers View post →
Vertumne
@Vertumne1 · X

Source: https://t.co/arMVBSQnIB

Sep 1, 2022 · 1 share · 17,991 followers View post →
Soviet kid in the West
@USSR2Europe · X

@Juleschao I see where you are coming from: sterilising kids=less humans=better for the planet. Hmm...

Aug 13, 2022 · 2,843 followers View post →
Patrick Hamilton
@patbhamilton · X

The big question that has kept people awake is if estrogen pollution will harm populations. In a famous paper, Canadian researchers dosed a whole lake with ~5ng/L ethinylestradiol for 3 years the fathead minnow population collapsed! https://t.co/cC6U6DuxL0

Jun 24, 2022 · 1 like · 1 share · 4,722 followers View post →