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Expert believes that menstrual changes after vaccination should be investigated

Science Writing, Sep 15 (EFE) .- Changes in menstruation do not appear on the list of common side effects after vaccination against covid-19, but the reproduction specialist from Imperial College London Victoria Male considers that a link is “plausible and should be investigated.”

Reported changes in menstruation or vaginal bleeding after vaccination “are short-lived” and most women find that they return to normal in the next cycle, Male writes in a comment published today in The British Medical Journal.

The expert highlights that “there is no evidence” that vaccination negatively affects fertility.

More than 30,000 notifications about changes in menstruation had been submitted to the UK Medicines and Health Products Regulatory Agency (MHRA) by day 2, the author writes.

The MHRA states that its surveillance data “does not support a relationship” between changes in menstrual periods and vaccinations against COVID-19, as the number of reports is low in relation to both the number of people vaccinated, and with the prevalence of menstrual disorders in general.

However, Male believes that the way the data is collected “makes it difficult to draw firm conclusions.”

Menstrual changes have been reported for both messenger RNA-based and adenovirus vaccines, “suggesting that, if there is a connection, it is likely the result of the immune response to vaccination, rather than a specific component of the vaccine, “he considers.

The menstrual cycle can be affected by the body’s immune response to the virus itself – he recalls – and a study has shown the existence of menstrual disorders in around a quarter of women infected with SARS-CoV-2.

“If a relationship between vaccination and menstrual changes is confirmed,” this will allow people who want to be vaccinated to plan in advance for potentially disturbed cycles, he explains.

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