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a study released thursday suggests that the covid-19 vaccine is linked to an average of less than a one-day change in menstrual cycles, which researchers say is no cause for alarm.
“it is reassuring that the study found only a small, temporary menstrual change in women,” said diana w. bianchi, m.d., director of nih’s eunice kennedy shriver national institute of child health and human development, in a press release . “these results provide, for the first time, an opportunity to counsel women about what to expect from covid-19 vaccination so they can plan accordingly.”
dr. alison edelman, an obstetricia/gynecologist and professor at the oregon health & science university, told cnn that while this finding is reassuring, many may find any change in their menstrual cycle concerning. this study can help them know what to expect.
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on average, a menstrual cycle is approximately 25 to 30 days in length, however, many experience cycles outside of this range. variations of up to eight days between cycles is considered normal by the international federation of gynecology and obstetrics.
the u.s. national institute of health announced last summer that it had earmarked $1.7 million for research into potential links of the covid-19 vaccination and changes in menstrual cycles.
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