Scientists launch study to find out if COVID-19 vaccines are causing period changes after hundreds of women notice irregularities
Their periods had either come earlier usual, felt heavier or just appeared irregular. Clancy and Lee are now collecting data on cycle changes post-vaccination to see if there is any association between the two. Clancy first discussed her abnormal period in a tweet in late February after receiving the Moderna coronavirus vaccine.
‘I’m curious whether other menstruators have noticed changes too?’ she wrote. ‘I’m a week and a half out from dose 1 of Moderna, got my period maybe a day or so early, and am gushing like I’m in my 20s again.
‘I’m on day 3 of my period and am still swapping out extra long overnight pads a few times a day. Typical for me at this time is maybe one or two regular pads.’ The tweet was liked more than 1,200 times and she received hundreds of replies from other women and people who menstruate documenting their unusual changes.