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© Copyright 2022 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed without permission.Study offers reassurance on COVID shots, women's periods
By LAURAN NEERGAARD WASHINGTON©2025 GPlusMedia Inc.
30 Comments
Wick's pencil
The key word there is "average". Although on average there is no significant change according to the app, a number of women have reported longer and/or more intense menses. This is consistent with the Pfizer data showing the vaccine nanoparticles accumulating on the ovaries. Just because most women haven't noticed any differences doesn't mean there is no damage. Time will tell.
Monty
a slightly larger change to their next cycle length, on average two days. About 10% of them had a change of eight days or more
Wow! My goodness!
10%??? 8 days or more???
That is a lot!
@Big Yen
This has nothing to do with anti-vaxing. This is about how safe is the vaccine for your body, and what changes or damages will occure after you took it.
I am not a woman, but I am sure that if my wife would have experienced a 8 days delay, she would never ever taken that vaccine anymore.
But lucky, she didn't have that experience.
Tora
Question anything these days and your an anti-vaxer. Even though you might have had the vaccine. A return to the Middle Ages.
virusrex
Averaging is precisely used to avoid giving too much importance to limited, infrequent reports that do not represent the actual situation.
Also, no there is no Pfizer data that shows accumulation of any of the vaccine on the ovaries, misrepresenting completely unnatural animal experiment results as if they could be extrapolated to humans is dangerous disinformation, if you do that it would be as valid to do the same with the rest of the results and say that 100% of all the unvaccinated subjects died of COVID.
And it does not, the normal, expected immune stimulation can have a limited, physiological effect on delicate reproductive cycles, the same as exercise, a limited amount of stress, changing the routine, etc. All frequent reasons for a delay of a day on average.
The experts say they are, and have the scientific data to prove it, somehow a nameless person on the internet saying all the scientists of the planet are wrong is not something worth of taking into account.
But not something as infrequent as you would like to believe, a mild fever for a common cold, changing jobs, some stressful event on life, etc. can make women even skip one cycle without any long lasting repercussions in their reproductive life. A vaccine that successfully mimics an infection to give a strong immune response against the actual infection can cause these transitory changes without it having any special meaning.
And how about all the other things that also cause this? "never ever" begin a new diet? begin an excercise routine? change her daily commute?
The problem is not questioning, the problem is spreading debunked false information to mislead others into making a wrong decision, which can validly be called to be antivaxxer propaganda. One thing is to ask "is this normal? does it happen with other vaccies?" another completely different is to lie and say "the vaccine accumulate in the ovaries and its dangerous"
Monty
And how about all the other things that also cause this? "never ever" begin a new diet? begin an excercise routine? change her daily commute?
What a nonsense reply.
How do these things change a woman's monthly period???
Daily commute is related to a woman's monthly period???
Man, if you have no argues that makes sense, you better say nothing.
virusrex
Even not being a woman is not an excuse to not understand that anything that can cause stress can temporarily change the cycles, this may surprise you but even if you don't know something that does not make it nonsense, it just mean you need to inform yourself better.
https://www.everydayhealth.com/pms/managing-stress-during-pms.aspx
https://health.clevelandclinic.org/can-stress-cause-you-to-skip-a-period/
https://www.associatesinwomenshealthcare.net/blog/menstruation-anxiety/
virusrex
It does, for rational people that understand biology, but no matter how much evidence is presented there will always be people that will reject science and will never be convinced that their preconceived ideas are wrong.
So, water is not good or safe? because it completely fullfills your description.
Vaccines have been demonstrated to be much safer than not vaccinating because they prevent the damaging effects of a virus that not only enters your body, but actively tries to disrupt your immunity while replicating uncontrollably. Not vaccinating would mean people choose to be exposed to bad and unsafe things, which would make those people whatever you want to call them.
Jimizo
Intriguing expression. Notable that you didn’t elaborate on it.
Tell us more.
Monty
@virusrex
We are talking here about a vaccine, a fluid, which is injected into your body to keep you healthy. And not make you sick or uncomfortable, and not extend a woman's period for 8 days or more.
Stress, what you mentioned, doesn't have the purpose to keep you healthy. Stress is already a kind of sickness itself and has bad influence to a human's health in many ways.
But the vaccine, should not have bad influence to your health.
It is oposite, the vaccine should keep you healthy. Therefore it is made for.
I guess you agree to that.
virusrex
Ignoring the examples that prove you wrong do not help your point, it only indicate you are not actually interested in what is healthy or not, just oppose vaccines because of your personal beliefs.
What do you think exercise is supposed to do? or a diet? exactly the same improve the health, and both can make people feel sick or uncomfortable, or even extend a woman's period or make her skip it completely for several months. This is not "a bad influence to your health" just a normal, expected, frequent reaction to biological or physical stress that have no actual impact on health.
According to you no woman should ever exercise or follow a better diet, because when some women do they skip their period which for you is "unhealthy".
prionking
Here's a link to the original study:
https://journals.lww.com/greenjournal/Fulltext/9900/Association_Between_Menstrual_Cycle_Length_and.357.aspx
The study is moderately encouraging but still inconclusive. Given that other doctors have noted that the lipid globules carrying the mRNA vaccines accumulate in the ovaries, the long-term effects on fertility and menstruation are unknown. These vaccines are still experimental, no matter what certain individuals claim. Take them if you want, but be aware that you're participating in an enormous drug trial with dubious informed consent.
And remember that this study is funded by the NIH, so it can't be rules spout that there will be implied expectations to produce the results the funder wants, especially since this is a highly contentious issue linked to the push to vaccinate everyone regardless of whether they need it or not.
https://www.nih.gov/news-events/news-releases/covid-19-vaccination-associated-small-temporary-increase-menstrual-cycle-length-suggests-nih-funded-study
virusrex
Sorry but that is false, there are no such thing. This is dangerous disinformation that has no basis in reality.
Again this is not true, this is only repeated in sites that promote dangerous and misleading information, the vaccines are no experimental in Japan, and mRNA vaccines have been fully approved in the US, people being vaccinated are not participating in any trial. They are being vaccinated to obtain the well proven benefit for their health, which greatly decreases the risk from COVID.
Monty
If a woman loses his period because of diet or excersise, what is the woman doing?
She stop or change the diet or the excersise.
So if the woman loses her period because of the vaccine, what will she do?
She will stop taking the next vaccine.
Maybe not all, but some.
Monty
This is from an article you can find:
Amenorrhea can lead to serious health problems, such as endometrial cancer or bone loss, so it should not be ignored.
you might experience other signs or symptoms along with the absence of periods, such as:
Milky nipple discharge.
Hair loss.
Headache.
Vision changes.
Excess facial hair.
Pelvic pain.
Acne.
Doesn't sound really healthy for me...but everyone is free to judge by themselves....
virusrex
Healthy things that nevertheless temporarily affect hormonal balance without any real negative effect for her health, which is the whole point. She does NOT need to stop nor change her diet nor her excercise routine just because she lost a period. that is terrible advice that is contradicted in the references you are trying to ignore.
Again, this is a normal, expected, frequent physiological change that do NOT indicate pathology by itself. Only your complete lack of knowledge about reproductive health that exaggerate something out of proportions just so you can justify opposing healthy medical interventions.
None of those problems have been described for vaccines, (or beginning a diet, or a daily routine of excercise), this is the important point.
Again, according to you doing a healthy diet or exercise is unhealthy and should be avoided, that should be enough to prove even to you that this is not actually something rational.
Monty
None of those problems have been described for vaccines,
Losing the period is described for vaccine clearly in the article!
And the points which are mentioned above can be a health problem as a consequence if a woman lose her period.
Ignoring that, doesn't make you more convincing.
But like I said, I am not a woman.
I let them decide how to judge these points.
Monty
To all the men here, a last tip from me,
Ask your wives or Girlfriends if they are happy and ready to probably lose their period after taking the vaccine.
Like I said, let the women decide.
It is not to us men.
Wick's pencil
It is data submitted by Pfizer to Japanese regulators. Lipid nanoparticles did accumulate at high levels in the ovaries. Obviously, this experiment cannot ethically be carried on women. But as I wrote, the results are consistent with many women reporting longer and more intense menses. Who knows what other long term effects will be observed as a result of this accumulation. Just because the app did not detect changes in most women doesn't mean there is no negative effect.
virusrex
that is the whole point, conditions impossible to met in humans is what give these results, so saying this applies to humans is false, and the reason why no institution of science or medicine in the world says the vaccine accumulates anywhere.
With true information, without exaggerating the importance of physiological changes without any pathologic meaning.
wasao
Like it or not, every person alive right now is a test subject of some kind-- either for the vaccines, or for the virus, or both. It sucks, but that's how it is. Anti-vaxxers worried about the newness of RNA technology surprisingly seem untroubled by the fact that covid-19 is almost just as new as the vaccines, and that it may not have had a totally natural origin. Even stranger, in the U.S. at least it seems to be the anti-vaxxers who are most certain that covid originated in a lab. And yet they refuse to get vaccinated because the vaccines are new, untested, unnatural...
We do not know the long-term effects of covid infection, either.