Several dozen cases of disruption of the menstrual cycle, after the first dose of vaccine, have been reported to the National Medicines Safety Agency.
- About 300 cases of menstrual disorders, occurring after vaccination, have been reported to the ANSM.
- In the United Kingdom, researchers from Imperial College London are currently conducting a study on this subject.
- For the ANSM and the EMA, there is no causal link between the vaccine and disturbances of the menstrual cycle.
“My period has been more than three weeks late since the second injection.” confides a surfer on Twitter, when another suffers from significant pain when she has just received a dose of vaccine. In recent times there have been increasing reports of menstrual disorders after vaccination. The National Agency for the Safety of Medicines and Health Products (ANSM) has identified 261 cases, including 30 serious, with the Cominarty vaccine from Pfizer and 49 cases, including 6 serious for the Spikevax serum from Moderna. She published a report on these side effects, Friday August 6th.
Generally temporary symptoms
According to the data reported by health professionals, vaccinated people and those around them, the side effects experienced are varied: delayed menstruation, unusual intermenstrual bleeding or even heavier bleeding. For the Pfizer vaccine, the median age of the people concerned is 36.5 years against 38 years for the Moderna vaccine. Regardless of the product received, the symptoms are more numerous after the first dose, compared to the second. “The evolution is spontaneously favorable for the majority of cases“, estimates the ANSM. This concerns 62.8% of cases for Pfizer and 78% for Moderna. “For other cases, the evolution remains unknown or unresolved at the time of the declaration“, she adds. In case of persistent symptoms, it is recommended to consult a doctor.
The vaccine in question?
“We cannot to date establish a link between vaccination and menstrual disorders, the causes of these disorders can be multiple.“, concludes the ANSM for the two vaccines. The European Medicines Agency (EMA), requested by the ANSM a few days earlier, provides a similar conclusion. In a press release, the European body affirms that no causal link has been established between vaccination against Covid-19 and menstrual disorders. “Menstrual disorders are very common and are not always associated with a medical cause, indicates the document. Causes can range from stress and fatigue to medical conditions like fibroids or endometriosisThe EMA has, however, requested more information from the manufacturers of the various vaccines.
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