
There are many reasons for your menstrual period to change, and you should seek a gynecologist’s advice if you are having issues with your period.
There has been some question as to whether vaccination against COVID-19 could disrupt a menstrual cycle.
A study published in the April 2022 Issue of OBSTETRICS & GYNECOLOGY looked at almost 4000 women with normal natural cycles and looked at the changes in cycles based on information on cycle length before an after vaccination. A newer study excluding women with known menstrual cycle irregularities or hormonal conditions looked at the same issue.
In fact, for all three of the available vaccines, there was less than a one day change in menstrual period length. And also getting SARS-CoV-2 infection, as well as COVID-19 vaccination can influence the menstrual cycle and cause alterations.
Change in length of menstrual cycles is not associated with vaccination, and you shouldn’t use worry about a possible menstrual cycle effect as a reason to defer indicated vaccinations.