DES (Diethylstilbestrol) Info

DES (Diethylstilbestrol) Info We welcome everyone from the DES community -- Mothers, Daughters, Sons, 3rd Generation and all exposed! In some clinics, it was given to every pregnant patient.

DES Info Association:

The DES tragedy of in-utero exposure and its devastating effects on multiple generations must not be forgotten. The medical community need education about the sequela of DES Exposure. (1) know how to screen the DES exposed, (2) Know the continueing long term effects of DES exposure, and (3) Provide prompt care when DES Exposed patients develop complications.

** What is DES

(diethylstilbestrol)? **

DES (diethylstilbestrol), is a teratogenic and carcinogenic synthetic estrogen (Endocrine Disruptor) , is the world’s first major drug disaster. It was prescribed to millions of pregnant women for decades: from 1938 into the 1970s in the United States; and until the mid-1980s in parts of Latin America, Europe, Australia, and the Third World (Currently in Kenya). The currently proven effects of exposure include a rare vaginal cancer in DES Daughters; greater risk for breast cancer in DES Mothers; possible risk for testicular cancer in DES Sons, along with transgender and reproductive malformations; abnormal reproductive organs; infertility; high-risk pregnancies; Skeletal issues and an increased risk for breast cancer in DES Daughters. There are a number of other suspected effects, including auto-immune disorders, but many of these effects are still awaiting further research. For decades, Big Pharma claimed DES prevented miscarriages and problem pregnancies. It was sometimes given as an injection, but primarily it was prescribed in pill form. Never patented, DES was marketed under 200 different names, although the majority of the drug was actually produced by Eli Lilly. DES was sometimes even included in prescription prenatal vitamins. As early as 1938, studies showed that DES promoted cancer in lab animals. But at that time, people thought animal studies only provided a hint of what could happen in humans. Also, no one knew that drugs could cross the placenta and affect a baby in utero. (Note there was a 1941 mouse study that showed mice with absent or deformed fallopian tubes. The warning signs were there for humans.) In 1941, the original clinical uses for DES were to treat gonorrheal vaginitis, senile vaginitis, menopausal symptoms and to suppress lactation. Between 1941 and 1947, it was used for pregnancy without FDA approval. No controlled studies were ever conducted by the drug companies to determine the effectiveness or safety of DES for use during pregnancy, even after some scientists started questioning its efficacy in the 1950s. As early as 1953, research revealed that DES did not work (The Dieckmann Study) – that DES actually brought about higher rates of premature birth and infant mortality – yet DES continued to be prescribed to pregnant women for decades. This is because pharmaceutical companies continued to heavily promote DES use to doctors. The drug was a top moneymaker for Big Pharma. In the late 1960s, there was an unprecedented appearance of rare cancer in young women. Clear cell cancer (CCA) – a rare cancer of the vagina – was diagnosed in an age group never before found to develop it. (Normally elderly women developed CCA.) There were eight such cases at Massachusetts General Hospital in Boston alone. One of the mothers raised the question of whether her daughter's cancer might be connected to DES exposure in utero. Doctors discovered the DES link in 1971 and published their findings in the April 1971 issue of New England Journal of Medicine. News of the cancer cases made national headlines. However, the FDA did not act on this information until public pressure, including Congressional Hearings, forced the FDA to issue a warning about DES in November 1971. The drug was not banned for human use. DES was contraindicated for pregnancy by the FDA in 1972. It was not until September 2000 that the FDA finally withdrew its approval of DES for humans. Researchers are now investigating whether DES health issues are extending into the next generation, the so-called DES Grandchildren (Third Generation). As study results come in, there is growing evidence that this group has been adversely impacted by a drug prescribed to their grandmothers. To this day, not one drug company has ever apologized or accepted responsibility for the DES tragedy. Nevertheless, they have paid millions in out-of-court settlements and verdicts to DES Daughters and Sons who suffered injuries from their exposure. Please join us in our mission to continue to provide information to the DES exposed on DES information and other health related information along with pushing for more physician education to know how to care for the DES exposed. Also, we are continuing to push for more research! Our moto is "Knowledge is Power" DES Info Association is a free resource for Diethylstilbestrol Information and Research

“DISCLAIMER: THIS SITE DOES NOT PROVIDE MEDICAL ADVICE. The information on this site, including but not limited to text, graphics, images and other material, is for informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis or treatment. If you have any questions about how the information contained on this website may relate to you, you should seek the advice of a physician or other qualified health care professional.”

DES Info: In utero diethylstilbestrol (DES) exposure alters Hox genes! Block, K., Kardana, A., Igarashi, P. and Taylor, ...
08/01/2026

DES Info: In utero diethylstilbestrol (DES) exposure alters Hox genes!

Block, K., Kardana, A., Igarashi, P. and Taylor, H.S. (2000), “In utero diethylstilbestrol (DES) exposure alters Hox gene expression in the developing mullerian system.” The FASEB Journal, 14: 1101-1108. https://doi.org/10.1096/fasebj.14.9.1101

This is an important study with demonstrated the following: “Produces changes in the expression pattern of several Hox genes that are involved in patterning of the reproductive tract. DES produces posterior shifts in Hox gene expression and homeotic anterior transformations of the reproductive tract. “ “DES induces HOXA9 or HOXA10 gene expression, respectively, to levels approximately twofold that induced by estradiol.”

This is an important statement: “Changes in Hox gene expression are a potential marker for the effects of in utero drug use that may become apparent only at late stages of development.”

https://pubmed.ncbi.nlm.nih.gov/10834931/

For further information, please review the article online or contact DES Info Association at [email protected]. Please include the title of the article.



[email protected]

DES Info:  2024 Study from the NCI on the Third Generation. Titus, L.; Hatch, E.E.; Bertrand, K.A.; Palmer, J.R.; Strohs...
07/26/2026

DES Info: 2024 Study from the NCI on the Third Generation.

Titus, L.; Hatch, E.E.; Bertrand, K.A.; Palmer, J.R.; Strohsnitter, W.C.; Huo, D.; Curry, M.; Hyer, M.; Aagaard, K.; Gierach, G.L.; et al. “Benign and Malignant Outcomes in the Offspring of Females Exposed In Utero to Diethylstilbestrol (DES): An Update from the NCI Third Generation Study.” Cancers 2024, 16, 2575. https://doi.org/10.3390/ cancers16142575

This study concludes with the following: “Females prenatally exposed to diethylstilbestrol have an elevated risk of severe cervical dysplasia and some cancers, while testicular cancer is increased in males. Based on third-generation females’ self-reports, diethylstilbestrol exposure was not associated with risks of overall cancer, breast cancer, or severe cervical dysplasia. Borderline ovarian cancer risk in exposed vs. unexposed was elevated but compatible with chance. Based on mothers’ reports, diethylstilbestrol exposure did not increase the risk of overall or other cancers in third-generation females.

Overall cancer risk in exposed males appeared elevated but compatible with chance. Testicular cancer risk was not elevated in exposed males, and there were no prostate cancers reported. These data do not provide evidence that diethylstilbestrol is associated with cancer risk in third-generation females or males.

The third generation is relatively young and requires follow-up to assess risk as the cohort ages.”
https://pmc.ncbi.nlm.nih.gov/articles/PMC11274475/

For further information, please review the article online or contact DES Info Association at [email protected]. Please include the title of the article.


[email protected]

Females prenatally exposed to diethylstilbestrol have an elevated risk of severe cervical dysplasia and some cancers, while testicular cancer is increased in males. We assessed these associations in the prenatally exposed female’s offspring (third ...

DES Info: DES exposure and blood DNA methylationBodelon C, Gierach GL, Hatch EE, Riseberg E, Hutchinson A, Yeager M, San...
07/23/2026

DES Info: DES exposure and blood DNA methylation

Bodelon C, Gierach GL, Hatch EE, Riseberg E, Hutchinson A, Yeager M, Sandler DP, Taylor JA, Hoover RN, Xu Z, Titus L, Palmer JR, Troisi R. “In utero exposure to diethylstilbestrol and blood DNA methylation in adult women: Results from a meta-analysis of two cohort studies.” Environ Res. 2023 Aug 15;231(Pt 1):115990. doi: 10.1016/j.envres.2023.115990. Epub 2023 May 4. PMID: 37149030; PMCID: PMC10442904.

This is a very interesting article on DNA methylation. The article concludes with the following:

“There are few opportunities to investigate the effects of prenatal DES exposure. These findings suggest that in utero DES exposure may be associated with differential blood DNA methylation levels, which could mediate the increased risk of several adverse health outcomes observed in exposed women.

The discussion reflects on DES as an Endocrine Disruptor: “DES is an endocrine disruptor and carcinogen that adversely affects reproductive health and increases risk of cancer in women exposed in utero.”

https://pubmed.ncbi.nlm.nih.gov/37149030/

For further information, please review the article online or contact DES Info Association at [email protected]. Please include the title of the article.




[email protected]

There are few opportunities to investigate the effects of prenatal DES exposure. These findings suggest that in utero DES exposure may be associated with differential blood DNA methylation levels, which could mediate the increased risk of several adverse health outcomes observed in exposed women. Ou...

Big thanks to Paula Smithfor all your support! Congrats for being top fans on a streak 🔥!
07/22/2026

Big thanks to Paula Smith

for all your support! Congrats for being top fans on a streak 🔥!

Thanks for being a top engager and making it on to my weekly engagement list! 🎉 Jude Denzer, Lula Atherton, JoEllen Trav...
07/17/2026

Thanks for being a top engager and making it on to my weekly engagement list! 🎉 Jude Denzer, Lula Atherton, JoEllen Travis, David Dennstedt, Dawn Gundlach

DES Info: The DES History..
07/05/2026

DES Info: The DES History..

This video explores the hidden history of Diethylstilbestrol, or DE...

DES Info: Psychological Effects of Exposure to DES.Schwartz RW, Stewart NB. “Psychological Effects of Diethylstilbestrol...
06/24/2026

DES Info: Psychological Effects of Exposure to DES.
Schwartz RW, Stewart NB. “Psychological Effects of Diethylstilbestrol Exposure.” JAMA. 1977;237(3):252–254. doi:10.1001/jama.1977.03270300056007
This article provides some good perspectives:
The psychological response of daughters and their mothers to discovery of in utero diethylstilbestrol (DES) exposure was studied
“The majority of patients found colposcopy to be unpleasant; they tended to be disturbed in proportion to the degree of being upset about DES exposure.”
“The most common problem among mothers was guilt.”
“Physicians showed that they had less concern for psychological problems than patients or mothers did.”
https://jamanetwork.com/journals/jama/article-abstract/350855

For further information, please review the article online or contact DES Info Association at [email protected]. Please include the title of the article.



[email protected]

. The psychological response of daughters and their mothers to discovery of in utero diethylstilbestrol (DES) exposure was studied. At the DES Colposcopy Clinic, 41 daughters and 20 mothers were extensively interviewed. Twelve patients with abnormal cytology tests were controls. Initial anxiety was....

Thanks for being a top engager and making it on to my weekly engagement list! 🎉 Dianne Ackerman, Cynthia Irving, Jude De...
06/19/2026

Thanks for being a top engager and making it on to my weekly engagement list! 🎉 Dianne Ackerman, Cynthia Irving, Jude Denzer, David Barraza

DES Info: DES and pregnancy experienceHerbst AL, Hubby MM, Blough RR, Azizi F. “A comparison of pregnancy experience in ...
06/15/2026

DES Info: DES and pregnancy experience
Herbst AL, Hubby MM, Blough RR, Azizi F. “A comparison of pregnancy experience in DES-exposed and DES-unexposed daughters.” J Reprod Med. 1980 Feb;24(2):62-9. PMID: 7359503.
This article stated the following: “Comparison of evaluable first pregnancy outcome revealed full-term live birth to be more common among the unexposed (85%) than the exposed (47%). Premature live birth was experienced by 22% of the exposed but only 7% of the unexposed. Nonviable outcomes of stillbirth, neonatal death, miscarriage and ectopic pregnancy occurred in 31% of the exposed and 8% of the unexposed.” “Overall 82% of the exposed and 93% of the unexposed had at least one live offspring.”
https://journals.lww.com/obgynsurvey/citation/1980/07000/a_comparison_of_pregnancy_experience_in.23.aspx

For further information, please review the article online or contact DES Info Association at [email protected]. Please include the title of the article..



[email protected]

An abstract is unavailable. This article is available as a PDF only.

DES Info:  A  message from a DES Daughter who developed Clear Cell Adenocarcinoma of the Uterus.https://voices.uchicago....
06/06/2026

DES Info: A message from a DES Daughter who developed Clear Cell Adenocarcinoma of the Uterus.

https://voices.uchicago.edu/ccaregistry/contact/
I am a DES daughter who had a CCA of the uterus when I was 60. I am now 72.

I have just signed consent forms to participate in a research study with the University of Chicago and would like to encourage anyone in our DES community who has been diagnosed with any gynecological CCA to contact them and see if you are eligible to participate.

You do not have to live in the Chicago area. There are no financial costs to you.

I will be providing blood work and access to other related medical info. That is all. I have provided their contact info in a link.
University of Chicago is the only place I could find that is doing this kind of research.

Please join me and let's make something good happen from our exposure to DES and subsequent cancer.

Contact Contact Information Dezheng Huo, M.D., Ph.D., Principal Investigator Natalija Djordjevic, B.A., Research Coordinator Emails: [email protected] Phone: (773) 702-9607 Feel free to contact our office to register or for more information Related Sources of Information: National Cancer Ins...

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