Tuesday, March 05, 2024
COVID-19 Vaccines Can Affect Menstrual Cycle, Researchers Find
Researchers confirmed that COVID-19 vaccines are linked to changes in the menstrual cycle, according to a study published in March.
Published in the Obstetrics & Gynecology journal on March 1, Oregon Health & Science University researchers found that women who received a COVID-19 shot in the first half of their menstrual cycle are more likely to receive cycle length changes than those who received the vaccine in the second half.
Those researchers used data from 20,000 users of a birth control app that was approved by the U.S. Food and Drug Administration (FDA) to determine what effects the vaccine has on the cycle. Most of the women whose data was analyzed were under the age of 35, while 28 percent were from North America, 33 percent were from Europe, and another 32 percent were from the United Kingdom, they said.
Some were vaccinated and some were not. For those who were vaccinated, 63 percent received an mRNA vaccine, the paper said.
“Individuals vaccinated in the follicular phase experienced an average 1-day longer adjusted cycle length with a first or second dose of COVID-19 vaccine compared with their pre-vaccination average,” the authors of the paper said, referring to women who got a dose of the vaccine during the first half of their cycle.
Those who got the vaccine in the second half or those who were not vaccinated experienced no changes, they found.
The authors added that there is now “a body of evidence demonstrating that the ... vaccine is associated with temporary menstrual cycle disturbances at the population level,” adding that “the underlying mechanism for a vaccine-related cycle length disturbance is still under investigation.”
“The leading hypothesis is that these disturbances are due to the immune response that vaccines are designed to produce,” the study said, adding that “the immune and reproductive systems interact closely with one another.” Cytokines, which are small proteins that control the immune system’s activity and are produced “as an early event in the vaccine response,” can impact that process, they added.
Little research has been conducted in the past on how vaccines—whether for COVID-19 or others—could influence the menstrual cycle, the study’s authors further noted.
Responding to the study’s findings, Dr. Alison Edelman, the lead author of the paper with the Oregon university, said that “we do know the immune and reproductive systems interact closely with one another,” adding that with vaccinations, “it is certainly plausible that individuals may see temporary changes in their menstrual cycle due to the immune response.”
Their findings also suggested that there may be changes in the length of the cycle, although they appear to be short-lived. But they added that women who notice significant changes should contact a healthcare provider.
And earlier in 2022, another set of researchers wrote that for women who received one of the COVID-19 vaccines, around 42 percent of respondents said they experienced increased menstrual bleeding. A majority of those who weren’t menstruating reported breakthrough bleeding after getting the shot, including two-thirds of women who were post-menopausal and slightly less than two-thirds of women who were using hormone treatments.
Most respondents received an mRNA vaccine made by either Moderna or Pfizer. But some also received Novavax, Johnson & Johnson, and AstraZeneca shots, according to the paper.
“We focused our analysis on those who regularly menstruate and those who do not currently menstruate but have in the past. The latter group included postmenopausal individuals and those on hormonal therapies that suppress menstruation, for whom bleeding is especially surprising,” Kathryn Clancy, a professor of anthropology at the University of Illinois Urbana-Champaign, said in a statement about the study’s findings at the time.
And it is not the first time that the same Oregon Health & Science University researchers found COVID-19 vaccines are associated with a change in the cycle. In 2022, they found that the change was pegged at under one day, and no change in menses length was detected.
While the study did not find vaccination associated with changes in menses length, “questions remain about other possible changes in menstrual cycles, such as menstrual symptoms, unscheduled bleeding, and changes in the quality and quantity of menstrual bleeding,” they wrote.
Pfizer Official’s Concerns
About a year ago, a Pfizer employee was seen in an undercover video telling a reporter with Project Veritas that he was concerned about the mRNA shot’s possible side-effects relating to menstrual cycles.
“There is something irregular about the menstrual cycles. So people will have to investigate that down the line because that is a little concerning,” the Pfizer official said in the video, adding that it “shouldn’t be interfering” with the cycles.
“I hope we don’t discover something really bad down the line,” he later added.
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COVID-19 Shot Hesitancy Driven by Knowledge of Adverse Events
People who did not comply with COVID-19 vaccine requirements were hesitant because they knew someone who had experienced a health problem after getting the injection, according to recent research.
“Knowing someone who experienced a health problem following COVID-19 injection reduced the likelihood of injection, the International Journal of Vaccine Theory, Practice, and Research reported.
Such people “were more likely to oppose injection mandates and passports.
Conversely, “knowing someone who had health problems following the COVID-19 illness increased the likelihood of injection,” the journal said.
Among those who were aware of at least one individual who experienced COVID-19 injection adverse events, they said they knew about 57 deaths following vaccination.
“The health issues reported ranged from serious problems such as cardiac arrests and other heart-related problems, blood clots and other circulatory problems, to neurological issues, as well as milder effects such as feeling sick, headache, fever, etc.”
The study, published on Feb. 16, investigated the factors that made people support or protest COVID-19 vaccine mandates and passports. Researchers collected information from an online survey completed by 2,840 individuals in December 2021.
It found that 22 percent of the respondents knew at least one person who experienced a health issue after getting vaccinated.
The authors cited other studies on vaccine hesitancy in the context of influenza to point out that “vaccination status [in these studies] is influenced by beliefs regarding vaccine safety, effectiveness in infection prevention, and the gravity of the illness that might be prevented.”
They cited a survey published by Rasmussen Reports in March last year which found that “nearly as many Americans believe someone close to them died from side effects of the COVID-19 vaccine as died from the disease itself.”
This survey combined with the results of the present study “affirms that opposition to COVID-19 injection mandates and passports has increased over time,” the researchers wrote.
Moreover, the findings of the study suggest that policymakers may find it difficult to “engender a consensus” when it comes to pushing for vaccine mandates and passports, the researchers stated.
The study found that having COVID-19 illness was not associated with preferences for injection mandates. However, those who were injected were found to be “much less likely to oppose injection mandates than are those that did not receive the injection.”
Race was a “strong predictor” of injection mandates, with minority populations like African Americans, Hispanics, and Asians being “less inclined” to oppose such regulations than Caucasians.
“Political identity is also important: Compared to Democrats, those who self-identify as Republicans are more likely to oppose mandates. Those who identify as Independent also tend to oppose injection mandates.”
One of the authors of the study is Mark Skidmore, a professor and Morris Chair in State and Local Government Finance and Policy at Michigan State University (MSU). He has previously published research in several journals like Economic Inquiry, Economics Letters, and the Journal of Urban Economics. The second author, Fernanda Alfaro, is a Ph.D. student at MSU.
Regarding funding and conflicts of interest, researchers said they received funds from an individual donor.
Safety Concerns and Vaccine Hesitancy
In a recent post at the International Center for Law and Economics, health economist Roger Bate points out that the COVID-19 vaccines “were not as effective as originally claimed, and were effectively forced onto many people in order for them to work, attend school, or travel.”
“There is early evidence that these and other factors may currently be contributing to heightened vaccine hesitancy, with potentially serious consequences for public health.”
A July 2022 analysis published in BMJ Global Health also raised similar concerns. It argued that mandatory COVID-19 vaccination policies were “scientifically questionable” and were more likely to result in harm than good.
“Restricting people’s access to work, education, public transport, and social life based on COVID-19 vaccination status impinges on human rights, promotes stigma and social polarisation, and adversely affects health and well-being,” it said.
The restrictive COVID-19 policies “may lead to a widening of health and economic inequalities, detrimental long-term impacts on trust in government and scientific institutions, and reduce the uptake of future public health measures, including COVID-19 vaccines as well as routine immunizations.”
In an interview with Fox News last year, Dr. Robert Redfield, former head of the Centers for Disease Control and Prevention (CDC), said that federal officials pushed a “false perception” that the COVID-19 vaccines provided “complete” immunization.
“There was such an attempt to not let anybody get any hint that maybe vaccines weren’t foolproof, which, of course, we now know they have significant limitations,” he stated.
“I always said … my position was just tell the American public the truth: There are side effects to vaccines. Tell them the truth, and don’t try to package it.”
Commenting on the Feb. 16 study, cardiologist Peter A. McCullough said in a Substack post that vaccine hesitancy would be higher in 2024 “as more injuries, disabilities, and deaths have been reported as a result of the novel genetic products” since the 2021 survey.
“When it comes to COVID-19 vaccination, hesitancy is a good thing demonstrating the population is concerned about consumer product safety of the mRNA and adenoviral DNA technology,” he wrote. Dr. McCullough also criticized the American Medical Association’s (AMA) view on vaccine hesitancy.
The AMA website has this statement: “While the AMA is a strong advocate for the effectiveness and safety of vaccines, we recognize that some members of the public may have historical, cultural, or religious reasons to distrust the vaccination process.”
The AMA’s views on the factors driving vaccine hesitancy are inapplicable, Dr. McCullough said. “Attempts to overcome vaccine hesitancy are likely to be harmful.”
Some experts have also raised concerns about vaccine hesitancy triggered during COVID-19 extending to other vaccines as well.
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Also see my other blogs. Main ones below:
http://edwatch.blogspot.com (EDUCATION WATCH)
http://antigreen.blogspot.com (GREENIE WATCH)
http://pcwatch.blogspot.com (POLITICAL CORRECTNESS WATCH)
http://australian-politics.blogspot.com (AUSTRALIAN POLITICS)
http://snorphty.blogspot.com (TONGUE-TIED)
https://immigwatch.blogspot.com (IMMIGRATION WATCH)
https://awesternheart.blogspot.com (THE PSYCHOLOGIST)
http://jonjayray.com/blogall.html More blogs
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