Covid-19 vaccines and periods

摘要

IN FEBRUARY, Kate Clancy at the University of Illinois tweeted that she had got her period early and was bleeding heavily following her first dose of the Moderna coronavirus vaccine, and asked if others had experienced a similar thing. Such was the response that she decided to set up a research survey to study the issue. Preliminary data -which hasn't been peer-reviewed - shows that Clancy isn't alone in noticing changes in menstruation patterns after a covid-19 vaccine.Up to 17 May, nearly 4000 reports of altered periods linked to covid-19 vaccination were made to the UK's Medicines & Healthcare products Regulatory Agency (MHRA). People reported delayed or heavier periods and unexpected bleeding.In total, 2734 reports mentioned the Oxford/AstraZeneca vaccine, 1158 were related to Pfizer/BioNTech and 66 to Moderna, according to data seen by The Sunday Times. However, the MHRA says the current evidence "does not suggest increased risk of either menstrual disorders or unexpected vaginal bleeding following the vaccines".