DES (Diethylstilbestrol) Info

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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: Just in... will ask for DES to be addressed
10/19/2026

DES Info: Just in... will ask for DES to be addressed

By the authority vested in me as President by the Constitution and the laws of the United States of America, it is hereby ordered: Section 1. Purpose and Every child deserves a safe and nurturing home where they can learn, grow, and reach their full potential. Adoption makes that possible by opening...

10/19/2026

DES Info: DES Daughter’s and Breast Screening Guidelines.

Camp EA, Coker AL, Robboy SJ, Noller KL, Goodman KJ, Titus-Ernstoff LT, Hatch EE, Herbst AL, Troisi R, Kaufman RH, Adam E. “Breast cancer screening in women exposed in utero to diethylstilbestrol.” J Womens Health (Larchmt). 2009 Apr;18(4):547-52. doi: 10.1089/jwh.2007.0580. PMID: 19361323; PMCID: PMC2857514.

Researchers examined these questions.

Their findings included the following:
• “The majority of DES-exposed women receive breast cancer screenings at least at recommended intervals, but over two-thirds do not perform monthly BSEs (breast self-exams).”
• “There is a need for greater awareness among health care providers about the higher risk of breast cancer for DES Daughters.”
• “This DES-exposed population of women will require future efforts to notify them of their increased risk and remind them of the importance of preventative examinations.”
• “It’s vital that DES Daughters — and all women — check their breasts monthly and report changes immediately. It’s another way that we can be proactive in our own health care.”

https://journals.sagepub.com/doi/10.1089/jwh.2007.0580

DES Info: We believe that physicians have a responsibility for any patient with DES exposure history. All health care providers consulted by DES Daughters — primary care, ob/gyns, breast specialists, oncologists — should make efforts, now and in the future, to notify consumers about annual breast and pelvic screenings. Annually is still the recommended frequency for exams.

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: DES & HOXA10 geneBromer, J. G., Wu, J., Zhou, Y., & Taylor, H. S. (2009). “Hypermethylation of HOXA10 by in ut...
10/03/2026

DES Info: DES & HOXA10 gene

Bromer, J. G., Wu, J., Zhou, Y., & Taylor, H. S. (2009). “Hypermethylation of HOXA10 by in utero diethylstilbestrol exposure: An epigenetic mechanism for altered developmental programming.” The Journal of Clinical Endocrinology & Metabolism, 94(5), 1836-1836.

In this study the researchers focused on the HOXA gene: “Taylor focused on the HOXA10 genes from DES Daughter mice because they act as important regulators of tissue identity. Alterations in HOX gene expression does cause abnormalities in tissues that depend on those genes for proper development.

According to Taylor, altered gene expression, or methylation, has been associated with reproductive tract abnormalities, such as those seen in DES Daughters and Sons, along with human cancers in adulthood. This research examined how HOXA10 gene expression is altered by in utero DES exposure.”

On note is their conclusion: The DES-caused hypermethylation of the HOXA10 gene in utero does not cease after birth. Taylor found that prenatal DES exposure “results in lasting changes in gene expression, persisting well after exposure, into adulthood.”

https://pubmed.ncbi.nlm.nih.gov/19299448/



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Diethylstilbestrol (DES) is a nonsteroidal estrogen that induces developmental anomalies of the female reproductive tract. The homeobox gene HOXA10 controls uterine organogenesis, and its expression is altered after in utero DES exposure. We hypothesized that an epigenetic mechanism underlies DES-me...

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DES Info: DES ~ Cardiovascular Disease Risk!Troisi, Rebecca, et al. "A prospective cohort study of prenatal diethylstilb...
09/21/2026

DES Info: DES ~ Cardiovascular Disease Risk!

Troisi, Rebecca, et al. "A prospective cohort study of prenatal diethylstilbestrol exposure and cardiovascular disease risk." The Journal of Clinical Endocrinology & Metabolism 103.1 (2018): 206-212.

This is an important finding and recommend you alert your physicians!

“Preliminary evidence from the National Cancer Institute (NCI) Combined DES Cohort Follow-up Study suggested a possible excess of CVD in women who were prenatally exposed to DES, but this was based on participants’ CVD report without verification.”
“In this paper, we update findings with additional follow-up and include physician-verified CVD diagnoses in a study of documented human exposure to DES in utero.”

https://pubmed.ncbi.nlm.nih.gov/29069384/

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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These data demonstrate associations in women who have prenatal DES exposure with CAD and MI, but not with stroke, which appear to be independent of established CVD risk factors.

World Patient Safety Day
09/17/2026

World Patient Safety Day

DES Info: DES – BPA’s link to breast cancer.Doherty LF, Bromer JG, Zhou Y, Aldad TS, Taylor HS. “In utero exposure to di...
09/12/2026

DES Info: DES – BPA’s link to breast cancer.

Doherty LF, Bromer JG, Zhou Y, Aldad TS, Taylor HS. “In utero exposure to diethylstilbestrol (DES) or bisphenol-A (BPA) increases EZH2 expression in the mammary gland: an epigenetic mechanism linking endocrine disruptors to breast cancer” Horm Cancer. 2010 Jun;1(3):146-55. doi: 10.1007/s12672-010-0015-9. PMID: 21761357; PMCID: PMC3140020

Interesting article on the study in the mouse model and breast cancer– “Diethylstilbestrol (DES) and bisphenol-A (BPA) are estrogen-like endocrine-disrupting chemicals that induce persistent epigenetic changes in the developing uterus.”

“However, DES exposure in utero is also associated with an increased risk of breast cancer in adult women. Similarly, fetal exposure to BPA induces neoplastic changes in mammary tissue of mice. “

“Similarly, mice exposed to BPA or DES in utero showed increased mammary histone H3 trimethylation. Developmental programming of EZH2 is a novel mechanism by which in utero exposure to endocrine disruptors leads to epigenetic regulation of the mammary gland.”

Research like this supports the recommendation for annual mammograms in DES Exposed Women.

https://pubmed.ncbi.nlm.nih.gov/21761357/

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]

Diethylstilbestrol (DES) and bisphenol-A (BPA) are estrogen-like endocrine-disrupting chemicals that induce persistent epigenetic changes in the developing uterus. However, DES exposure in utero is also associated with an increased risk of breast cancer in adult women. Similarly, fetal exposure to B...

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DES Info: Gene Alteration – HOXA GenesBromer JG, Wu J, Zhou Y, Taylor HS. “Hypermethylation of homeobox A10 by in utero ...
09/05/2026

DES Info: Gene Alteration – HOXA Genes

Bromer JG, Wu J, Zhou Y, Taylor HS. “Hypermethylation of homeobox A10 by in utero diethylstilbestrol exposure: an epigenetic mechanism for altered developmental programming.” Endocrinology. 2009 Jul;150(7):3376-82. doi: 10.1210/en.2009-0071. Epub 2009 Mar 19. PMID: 19299448; PMCID: PMC2703508.

This is an important study because the HOXA genes were altered by DES Exposure.

This study concludes with the following:
“DES has a dual mechanism of action as an endocrine disruptor; DES functions as a classical estrogen and directly stimulates HOXA10 expression with short-term exposure, however, in utero exposure results in hypermethylation of the HOXA10 gene and long-term altered HOXA10 expression. We identify hypermethylation as a novel mechanism of DES-induced altered developmental programming.”
https://pubmed.ncbi.nlm.nih.gov/19299448/

DES Info: These genetic mutations are important…more research is needed!
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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