COVID shots linked with temporary increase in menstrual cycle length: Study

Updated: Sep 28 2022 3:14PM

Washington, Sep 28 (PTI) COVID-19 vaccination is associated with an average increase in menstrual cycle length of less than one day, a study published in the British Medical Journal has found.

The researchers from Oregon Health & Science University, US, determined that on average, vaccinated people experienced an increase of less than one day in each menstrual cycle in which they were vaccinated.

They found a 0.71 day increase after the first vaccine dose and a 0.56 day increase after the second shot. The study found that women who received both doses in a single cycle experienced a 3.91 day increase in cycle length.