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: Diethylstilbestrol-induced oxidative DNA damage in spermatogonial stem cells in vitro.The spermatogonial stem ...
08/24/2026

DES Info: Diethylstilbestrol-induced oxidative DNA damage in spermatogonial stem cells in vitro.

The spermatogonial stem cells (SSCs) are responsible for the transmission of genetic information from an individual to the next generation. SSCs play a very important role in the maintenance of normal tissue and provide an understanding of the rudimentary reproductive biology of gametes and a strategy for diagnosis and treatment of infertility and male reproductive toxicology.

The balance between hormonal androgens/oestrogens is very important for the suitable maintenance of male germ cells, because there is evidence confirming the damaging effects of oestrogen-like compounds on male reproductive health.

The results showed DES-induced DNA damage, increased apoptotic cells, and increased production of intracellular superoxide anions. Investigating the mechanisms and biology of SSCs in this way helps to provide a better understanding of spermatogonial stem cell regulation.

8th World Congress and Expo on: Cell & Stem Cell Research.
March 20-22, 2017 - Orlando, Florida, USA
https://pubmed.ncbi.nlm.nih.gov/28315349/



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DES Info:  DES - DNA damage in spermatogonial stem cells in vitro.Habas K, Brinkworth MH, Anderson D. “Diethylstilbestro...
08/19/2026

DES Info: DES - DNA damage in spermatogonial stem cells in vitro.

Habas K, Brinkworth MH, Anderson D. “Diethylstilbestrol induces oxidative DNA damage, resulting in apoptosis of spermatogonial stem cells in vitro.” Toxicology. 2017 May 1;382:117-121. doi: 10.1016/j.tox.2017.03.013. Epub 2017 Mar 14. PMID: 28315349.
https://pubmed.ncbi.nlm.nih.gov/28315349/

The results of this study notes the following: The results showed DES-induced DNA damage, increased apoptotic cells, and increased production of intracellular superoxide anions. Investigating the mechanisms and biology of SSCs in this way helps to provide a better understanding of spermatogonial stem cell regulation.”
For further information, please review the article online or contact DES Info Association at [email protected]. Please include the title of the article.



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I’m proud to share that I graduated today as a “PATIENTS Professor” from The PATIENTS Program at the University of Maryl...
08/17/2026

I’m proud to share that I graduated today as a “PATIENTS Professor” from The PATIENTS Program at the University of Maryland School of Pharmacy.

This was a powerful program connecting with patients and fellow patient advocates, learning from their perspectives, and to strengthen my role as a “Patient with Lived Experience” and as a “Credible Messenger” in my work as a patient advocate and as administrator of DES Info Association. I am deeply grateful for this experience.
!

DES Info: DES – DNA & the UterusSato K, Fukata H, Kogo Y, Ohgane J, Shiota K, Mori C. “Neonatal exposure to diethylstilb...
08/16/2026

DES Info: DES – DNA & the Uterus

Sato K, Fukata H, Kogo Y, Ohgane J, Shiota K, Mori C. “Neonatal exposure to diethylstilbestrol alters expression of DNA methyltransferases and methylation of genomic DNA in the mouse uterus.”
Endocr J. 2009;56(1):131-9. doi: 10.1507/endocrj.k08e-239. Epub 2008 Nov 8. PMID: 18997445.

This article states the following: “Neonatal exposure to diethylstilbestrol alters expression of DNA methyltransferases and methylation of genomic DNA in the uterus”

“Perinatal exposure to diethylstilbestrol (DES) can have numerous adverse effects on the reproductive organs later in life, such as va**nal clear-cell adenocarcinoma.”

https://pubmed.ncbi.nlm.nih.gov/18997445/

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:  Over 900 genes potentially altered! Yin Y, Lin C, Veith GM, Chen H, Dhandha M, Ma L. “Neonatal diethylstilbes...
08/11/2026

DES Info: Over 900 genes potentially altered!

Yin Y, Lin C, Veith GM, Chen H, Dhandha M, Ma L. “Neonatal diethylstilbestrol exposure alters the metabolic profile of uterine epithelial cells”. Dis Model Mech. 2012 Nov;5(6):870-80. doi: 10.1242/dmm.009076. Epub 2012 May 31. PMID: 22679223; PMCID: PMC3484869.

Interesting research article states: “Developmental exposure to diethylstilbestrol (DES) causes reproductive tract malformations, affects fertility and increases the risk of clear cell carcinoma of the va**na and cervix in humans.”

“Over 900 genes show differential expression upon DES treatment in either one or both tissue layers.”
https://pubmed.ncbi.nlm.nih.gov/22679223/

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


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Developmental exposure to diethylstilbestrol (DES) causes reproductive tract malformations, affects fertility and increases the risk of clear cell carcinoma of the va**na and cervix in humans. Previous studies on a well-established mouse DES model demonstrated that it recapitulates many features of....

Thanks for being a top engager and making it on to my weekly engagement list! 🎉 Vickie Dandridge, Jude Denzer, Marijs Bo...
08/11/2026

Thanks for being a top engager and making it on to my weekly engagement list! 🎉 Vickie Dandridge, Jude Denzer, Marijs Boulogne, David Barraza, Susan- Steve Wittich

DES Info: Direct effect of DES exposure on the risk of low birthweight/preterm birth in the 3rd Generation.Yim G, Robert...
08/06/2026

DES Info: Direct effect of DES exposure on the risk of low birthweight/preterm birth in the 3rd Generation.

Yim G, Roberts A, Wypij D, Kioumourtzoglou MA, Weisskopf MG. “Grandmothers' endocrine disruption during pregnancy, low birth weight, and preterm birth in third generation.” Int J Epidemiol. 2022 Jan 6;50(6):1886-1896. doi: 10.1093/ije/dyab065. Epub 2021 Apr 5. PMID: 34999879; PMCID: PMC8743108.

This research article concludes with the following.
“Grandmother use of DES during pregnancy is associated with an increased risk of LBW, predominantly through an increased risk of PTB. Results when considering G1 birth outcomes suggest this does not result from confounding by indication.”

https://pubmed.ncbi.nlm.nih.gov/34999879/

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]

Grandmother use of DES during pregnancy is associated with an increased risk of LBW, predominantly through an increased risk of PTB. Results when considering G1 birth outcomes suggest this does not result from confounding by indication.

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.



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