The Covid vaccination could have temporary effects on the menstrual cycle

With anti-Covid vaccinations progressively involving increasingly younger sections of the population, reports of women reporting menstrual irregularities following immunization. Some have changes in the flow, others a delayed or early cycle, and in some cases there have also been episodes of postmenopausal bleeding, as indicated by Professor Kate Clancy of the University of Illinois, who together with researcher Katharine Lee of Washington University School of Medicine, has launched a survey to assess the incidence of such events.

To report changes – said Clancy in the podcast Science Weekly of the Guardian – women are on hormonal contraceptives, those on hormone therapy and postmenopausal women who have reported unexpected bleeding. Some women of childbearing age have instead reported an earlier and heavier cycle, while others delayed and lighter. However, there is also a high number of women who have not reported any changes”.

Temporary effects on the menstrual cycle

These findings, on the whole, have suggested a very variable experience and which, according to experts, would take on a temporary nature. “I think it is conceivable and plausible that the cycle could lose temporarily its pace after the anti-Covid vaccination“Said a The mirror Dr. Christian Thaler, head of the Hormones and Fertility Center at the Ludwig Maximilians University of Munich, believes that the possible explanation for these irregularities lies in the modifications of the uterine lining, where different types of immune cells reside. “After a vaccination that stimulates the immune system, the immune cells of the uterine lining also react – spiega Thaler -. So-called cytokines, i.e. immune messenger substances that cause fever and pain in the limbs, can also affect the immune cells of the uterine lining”.

Although it is therefore possible to hypothesize an effect on the menstrual cycle, there is currently no evidence of an increased risk of menstrual disturbances or unexpected bleeding following vaccination, nor any observations that anti-Covid sera can in any way affect fertility or reproductive health.

In principle, reports of cycle changes after Covid vaccination could also be random observations, as noted by Dr. Vanadin Seifert-Klauss, head of the Gynecology Clinic at the Technical University of Munich and member of the Advisory Committee of the Section of Reproductive Biology and Medicine of the German Society of Endocrinology.

According to Seifert-Klauss it is plausible that the irregularities are triggered by local inflammatory reactions in the uterus after vaccination but “causality has not been proven“. In any case, Thaler added, these would be transient effects. “Everything indicates that we are talking about a temporary phenomenon, like other side effects of a vaccination. For all we know, women’s fertility and health are unaffected”.

Seifert-Klauss also assumes that post-vaccination irregularities are transient. On the other hand, to women who are experiencing alterations in the cycle he recommends: “If bleeding disorders last more than three months, you should go to a doctor for specialist evaluation. The cycle depends on many factors, and is a vital sign, as important as blood pressure or pulse in internal medicine. Although, unfortunately, this aspect is completely underestimated”.

!function(f,b,e,v,n,t,s) {if(f.fbq)return;n=f.fbq=function(){n.callMethod?
s.parentNode.insertBefore(t,s)}(window, document,’script’,
fbq(‘init’, ‘2062554930705272’);
fbq(‘track’, ‘PageView’);
//fbq(‘track’, ‘ViewContent’);
//send custom checkpoints event
(function () {
var checkPoints = [10, 20, 40, 60, 90, 120, 180, 240, 300].sort(function(a, b) {
return a – b;
}); //seconds
var checkPointIndex = 0;
var f = function(){
var data = {
instant: checkPoints[checkPointIndex]
console.log(“[FB PIXEL] send custom event ViewContentCheckPoint “, data, ” on account ” ,”2062554930705272″ , ” currentTime in seconds “,
new Date().getTime() / 1000);
fbq(‘trackCustom’, ‘ViewContentCheckPoint’, data);
if(checkPointIndex < checkPoints.length) {
setTimeout(f, (checkPoints[checkPointIndex] – checkPoints[checkPointIndex-1]) * 1000)
setTimeout(f, checkPoints[checkPointIndex] * 1000)


Disclaimer: If you need to update/edit/remove this news or article then please contact our support team Learn more

Leave a Reply