Several women say they have had heavier and more painful periods since the COVID-19 vaccine, with several also revealing that they had breakthrough bleeding in the middle of a cycle after receiving the vaccine.
Dr Kate Clancy, an associate professor at the University of Illinois, tweeted in February that she had heard of people who had experienced changes in their periods after receiving one or two vaccines.
Her Twitter feed prompted more women to share their menstrual concerns on Twitter, revealing their heavy flow, aggravated cramping and irregular timing – one saying she spent 16 days bleeding after receiving the Johnson & Johnson vaccine.
Changes: Some women report heavier, more painful periods after receiving COVID-19 vaccine (stock image)
Dr Clancy first tweeted on February 24, but his thread continued to find other Twitter users looking for explanations of their symptoms.
“A colleague told me that she had heard other people say that their periods were abundant after the vax,” she wrote.
“I’m curious if other menstruators have noticed changes as well?” I’m a week and a half away from Moderna 1 dose, have my period maybe a day or so early, and gush like I’m 20 again.
“I’m on day 3 of my period and still exchange extra long towels overnight several times a day. Typical for me right now is maybe one or two regular tampons (albeit very absorbent, the Always Infinity ones) for the whole day, ”she continued.
“Does this have to do with how the vax response mounts a larger inflammatory response, perhaps more due to the mechanism of lipid nanoparticles or mRNA?” Anyway, I am fascinated! Inflammation + tissue remodeling = additional bleeding agents! she added.
Soon, other Twitter users shared their own experiences. Although several said their rules have not changed, many of those who took the time to comment reported differences.
Viral: Dr. Kate Clancy, associate professor at the University of Illinois, tweeted in February that she had heard of people who had experienced changes in their periods.
The most common changes include heavier periods and those that start in the middle of a cycle.
“I had J&J on March 15th, then started my period about 2 days later – over a week earlier. It was heavier than normal, ”one wrote.
“Exactly two weeks after shot number 2, my cycle started 12 days earlier and heavier than it has been in the past three years,” said another.
“I’m 3 weeks away from my first Moderna shot and started my period in the middle of a BC field. This has never happened to me in 12 years of taking the pill. I never even spotted between the rules, ”wrote one more.
“My period after the first dose of Moderna came a week earlier and was the most painful I have ever had,” another tweeted. “After the second dose, it was almost two weeks late and my cycle has been regular for years, so I knew it was the vaccine, but I was afraid to say it. ”
“I thought I was going to go INSANE,” replied another. “I got the J&J vaccine three days before my period started and it’s been now… 16 days of bleeding (normal periods for 5 days, then light but constant bleeding for the rest). “
They too: Her Twitter feed prompted more women to share their menstrual concerns on Twitter, revealing their heavy flow, worsening cramps and irregular timing.
‘Me too!’ wrote one more. “I have an IUD and haven’t had a period for years, but I have cramps and spots today (1st dose of Pfizer was yesterday). Not much, well worth it, but strange!
Monica Grohne, founder of Marea Wellness, said her company has “heard from thousands of women about COViD and the vaccine affecting their periods.”
Others have discussed their own experiences on Reddit, along with hundreds of other commenters.
“I had my first Pfizer vaccine on Friday, my breasts hurt on Sunday and started my period yesterday. It is two weeks earlier. I’ve been running like clockwork on a 26-28 day cycle since they started 25 years ago, ”one wrote.
“Mine was on time but super heavy which is not my standard,” said another.
To further his investigation, Dr Clancy has since created an open survey of adults who have had at least one menstrual period in their lifetime and who have received at least one COVID-19 vaccine.
Side effects: Monica Grohne, founder of Marea Wellness, said her company has “heard from thousands of women about COVID and the vaccine affecting their periods”
Meanwhile, in the United States, the Centers for Disease Control and Prevention has its own system for reporting vaccine-related adverse events.
According to Health, experts aren’t sure why some women might see changes in their periods, and so far there isn’t enough data to know.
Infectious disease expert Amesh A. Adalja, MD, a senior researcher at the Johns Hopkins Center for Health Security in Maryland, suggested that any additional pain may simply be related to normal vaccine pain.
Others have suggested that stress might be a factor.
“There is no biological mechanism that would explain [the] disruption of the menstrual cycle after receiving the COVID-19 vaccine, ”said Mark Turrentine, MD, professor of obstetrics and gynecology at Baylor College of Medicine in Texas.
He also said the bleeding changes did not appear to be a side effect in clinical trials.
Although there is no concrete data on post-vaccination periods yet, a small study of 177 patients published in the journal Reproductive BioMedicine Online in January found that 25% of those who had the virus had experienced ” menstrual volume changes ”and 19% had longer periods than usual.
Statistics: Women are more likely to report worse side effects after receiving them than men, CDC data reveals
On Facebook, a global support group for longtime COVID sufferers with more than 22,000 female members is hosting many discussions about a sudden lack of periods and concerns about fertility.
A survey of more than 100 members with a long COVID found that 80% reported that their periods had changed since their infection with COVID.
When it comes to the vaccine, women are more likely to report worse side effects after receiving them than men, CDC data shows.
In February, officials reviewed nearly 7,000 reactions reported to the agency’s vaccine-related adverse event reporting (VAERS) system.
They found that almost 80% of reactions were reported by women, making them four times more likely to report a side effect than men.
This was true whether they received the Pfizer-BioNTech vaccine or the Moderna vaccine, despite the fact that women are less likely to become seriously ill from COVID-19 than men.