COVID-19 Can Mess With Your Periods in Multiple Ways

It’s completely normal for menstrual cycles to vary slightly from month to month, but if you’ve noticed unusual changes right around the time you had COVID-19 or the vaccination that helps prevent it, it’s not all in your head. You’re part of a scientifically recognized crowd.

Consider the results of an international study of more than 6,000 people, published August 2023 in the journal Obstetrics and Gynecology. This research is simply the latest showing that people with COVID-19 may experience small, temporary changes in menstrual cycle length.

Among unvaccinated subjects who reported having COVID-19, the scientists calculated a 1.45-day increase in menstrual cycle length compared with previous cycle length average.

As for the impact of COVID-19 vaccination, another study published June 2023 in the journal Vaccine confirms previous research linking immunization with a temporary average increase in menstrual cycle length — of about a day, the scientists found.

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