The anti-Covid vaccine would interrupt the menstrual cycle

This is a side effect of the anti-Covid messenger RNA vaccines that many women have reported. According to a study carried out by the Epi-Phare organization, which brings together the National Agency for the Safety of Medicines (ANSM) and social security, there is indeed a risk of menstrual disorders and the Pfizer and Moderna vaccines.

In a press release, the authors explain that their study “ highlights a 20% increased risk of heavy menstrual bleeding requiring treatment within one to three months”after receiving a first dose of messenger RNA vaccine.

This risk would last three months and then disappear, even after a subsequent booster dose.

Studies with opposite results

Since the beginning of the Covid-19 pandemic, studies have continued on this hypothetical link between menstrual disorders and the vaccine, but without consensus.

In January 2022, an American study conducted by Alison Edelman, professor of obstetrics and gynecology at Oregon Health & Science University, concluded that there is no “Clinically significant change in menstrual cycle length associated with Covid-19 vaccination”.

This conclusion also corresponds to that of a large study conducted in Sweden, the results of which were published in spring 2023 in British medical journal (BMJ).

But questioned by Huffpost, the authors of the Epi-Phare study point to methodological differences to explain these contradictory results. According to epidemiologist Rosemary Dray-Spira, who oversaw the French study, the Swedish study chose to start the study just a week after vaccinating patients, which “may have led to masking a possible increase in risk that would have occurred shortly thereafter”. The French research began measurements a month after the women received the first dose.

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