Covid-19 vaccination confirmed to have effect on period

The production of inflammatory proteins known as cytokines triggered by the Covid-19 vaccine disrupts the way the body regulates the menstrual cycle. — AFP

Women vaccinated against Covid-19 saw a slight delay in their period of almost a day compared to those who were unvaccinated, a US government-funded study said on Jan 13 (2021).

But the number of days of bleeding was not affected, according to the research carried out on nearly 4,000 individuals and published in the journal Obstetrics & Gynecology.