New Research Reveals Unprecedented Rise in Cases of Historically Rare Gynecological Event Following the Rollout of COVID Vaccines in the U.S.

April 28, 2022

Press Release

For Immediate Release

Washington, DC – A new scientific research paper published in The Gazette of Medical Sciences on April 21, 2022 showed an alarming, unprecedented spike in reported cases of a previously extremely rare gynecological condition called membranous dysmenorrhea, or “decidual cast shedding” (DCS), beginning in 2021 as COVID vaccines were distributed to the U.S. population. DCS occurs when the entire lining of the uterus sheds and exits the body in one piece. The process can be extremely painful.

Prior to COVID, there were less than 40 cases of DCS reported in the medical literature over the previous 109 years, making it extremely rare. The authors of the paper conducted the MyCycleStory℠ study in which 292 women reported having a DCS event over 7.5 months in 2021. Three of the study’s co-authors, Dr. Brian Hooker, Dr. Sue Peters and Ms. Heather Ray, are part of the Children’s Health Defense (CHD) science and research team.

The study was designed after an extraordinary number of women began sharing their experiences of menstrual irregularities on various social media platforms following the wide-spread distribution of the COVID vaccinations, resulting in a survey with over 150,000 participants that suggested a remarkable increase in menstrual irregularities starting in 2021. MyCycleStory℠ was created and conducted by thirteen scientists and physicians to follow up on previous reports and to gather more extensive data on the unusual increase in menstrual issues after the COVID vaccines were introduced into the population. The MyCycleStory℠ study collected detailed data from 6,049 survey participants between May 16 – December 31, 2021, all of whom described having abnormal menstrual symptoms.

In addition to the survey data, the study authors looked at Google metadata during 2021 and found that there was a 2,000% increase in the search terms “decidual cast” and “decidual cast covid vaccine” during the first two quarters of 2021. This rise is thought to be the result of women searching online for a term incorporating the symptoms they were experiencing. Some of the survey respondents included detailed testimonials of their DCS experiences.

“The increase in reports of decidual cast shedding is absolutely stunning and needs to be investigated further to understand the causes,” said Dr. Hooker. “CHD is committed to understanding all health outcomes of all vaccines especially when they can have far-reaching, long-term effects.”

According to the MyCycleStory℠ investigators, this paper is the first of three peer-reviewed research studies to be published from findings in the survey data regarding menstrual experiences, irregularities and other related symptoms and the possible effects of the distribution of the COVID vaccines.


Children’s Health Defense is a 501(c)(3) non-profit organization. Its mission is to end childhood health epidemics by working aggressively to eliminate harmful exposures, hold those responsible accountable, and establish safeguards to prevent future harm. For more information, visit

Sign up for free news and updates from Robert F. Kennedy, Jr. and the Children’s Health Defense. CHD is implementing many strategies, including legal, in an effort to defend the health of our children and obtain justice for those already injured. Your support is essential to CHD’s successful mission.

Read further at Children’s Health Defense

Leave a Reply

Your email address will not be published.