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COVID-19 And The Surge In Decidual Cast Shedding

Researchers found that the number of reported cases of decidual cast shedding was much higher than historically documented cases, raising questions about its cause. The timing of the COVID-19 vaccine distribution alongside these experiences led to speculation about a potential correlation that requires further investigation.

This issue is significant because it challenges the safety claims surrounding the vaccine’s impact on women’s fertility. The Pfizer clinical trial data states that the fertility effects are unknown, contradicting the assurance of its safety. The suppression of women’s stories and the need for immediate addressing of unanswered questions further underscore the importance of this conversation.

The MyCycleStory team will continue to explore other reported symptoms and their potential causes, focusing on women of reproductive age and post-menopausal women. It is crucial to understand and discuss the potential impact of COVID-19 and its vaccine on women’s fertility to ensure their well-being.

Peer Reviewed Paper in the Gazette of Medical Sciences

A snapshot of the study

Summary of the report: This report studied recent menstrual irregularities in women. It looked at a rare occurrence called decidual cast shedding, where the uterus sheds tissue in one piece. The study found a significant increase in cases of this rare occurrence after 2021.

What is Decidual Cast Shedding? Decidual cast shedding is a process that can happen to some women during their menstrual cycle. Normally, the lining of the uterus, called the decidua, gets thicker to prepare for a possible pregnancy. If pregnancy doesn’t occur, the decidua sheds and comes out of the body through the vagina. In the case of decidual cast shedding, the decidua comes out in one solid piece that looks like the shape of the inside of the uterus, almost like a triangular mold. This can be a rare and sometimes painful experience for women. It’s important to remember that everyone’s body is different, and not all women will experience decidual cast shedding.

Why this study was performed: MyCycleStory wanted to understand why more women were experiencing decidual cast shedding. They also wanted to explore if there was a connection to the COVID-19 vaccine. It was important to investigate these changes in women’s bodies and find out if there were any potential risks or causes.

What’s important to know: The study found that decidual cast shedding is usually very rare, with only a few cases reported in the past 100 years. However, after 2021, there was a huge increase in reported cases. This change is something that doctors and scientists need to pay attention to and investigate further.

Noteworthy numbers and what they mean: The study collected 292 reports of decidual cast shedding over 7 months after January 2021. This is a large number compared to the few cases that were reported in the past. It shows that there has been a significant increase in this rare occurrence.Conclusion: The study shows that more women have been experiencing decidual cast shedding recently. It’s important for doctors and scientists to study this change and find out what might be causing it. Further research is needed to understand if there is a connection to the COVID-19 vaccine or other factors.

Women should talk to their doctors if they experience any changes in their menstrual cycles and consider all possibilities for the cause.


  • Tiffany Parotto: Director and Founder of MyCycleStory, Research Analyst
  • James A. Thorp MD: Department of Ob/Gyn, Division of Maternal Fetal Medicine, SSM Health, St. Louis, MO 
  • Brian Hooker PhD: Chief Scientific Officer, Children’s Health Defense, Franklin Lakes, NJ 
  • Paul J. Mills, Ph.D: Professor, Family Medicine and Public Health, University of California, San Diego, La Jolla, CA
  • Jill Newman MS: Biostatistician, Mount Pleasant, SC 
  • Leonard Murphy: Research Advisor, Atlanta, GA 
  • Warren Geick: Research Data Analyst, Austin, TX 
  • Dan McDyer MD: Private Practice Obstetrician/Gynecologist, Jacksonville, FL 
  • Raphael B. Stricker MD: Union Square Medical Associates, San Francisco, CA 
  • Sue E. Peters PhD: Research Fellow, Children’s Health Defense, Franklin Lakes, NJ 
  • Maureen McDonnell: BSN, Barnardsville, NC 
  • Heather Ray: Science and Research Assistant, Children’s Health Defense, Franklin Lakes, NJ 
  • Christiane Northrup MD: Former Fellow of the American College of Obstetrics and Gynecology, Former Assistant Clinical Professor of Ob/Gyn U of Vermont College of Medicine, Portland, ME