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Post-Vaccine Menstruation Changes Are Smaller Than Natural Ones

  • Two studies show period changes are small and reverse quickly
  • Data should be reassuring to women says BMJ editorial

Changes to periods reported by women who received the Covid-19 vaccine are short-lived and smaller compared with those that occur naturally, according to two observational studies in the U.S. and Norway. 

The findings should be reassuring to women, said Victoria Male, a reproductive specialist at Imperial College London, in an editorial published Wednesday in the BMJ.