Many people have noticed that their periods change after having the covid vaccine however according to a new study, these changes are "small" and "quickly reverse".
Since the roll out of the vaccine, almost 40,000 women have reported a change in their menstruation to the Medicines and Healthcare products Regulatory Agency (MHRA) after having the jag in the UK.
However looking into the latest reports, Dr Victoria Male, lecturer in reproductive immunology at Imperial College London, said that the latest evidence on the changes to a woman’s cycle are “limited but reassuring".
In an editorial published in The BMJ, Dr Male highlighted a study in the US which found that the first dose of vaccine was not linked to changes to the timing of a woman's next period however there were changes after the second dose causing a delay, on average, of 0.45 days.
The women most affected were those who received both doses in the same menstrual cycle, who experienced an average delay of 2.32 days.
Although it mentions having two doses within the same cycle, this for many will be unlikely circumstances given there is a waiting period of eight weeks before the second dose, according to the NHS.
Despite some people noticing changes after the injection, the study states that anyone affected should have short lives symptoms and that their cycle should return to normal after a couple of months.
Dr Male wrote: "The findings from both these studies are reassuring: changes to the menstrual cycle do occur following vaccination, but they are small compared with natural variation and quickly reverse.
"The MHRA says that current evidence does not support a link between changes to menstrual periods and covid vaccination in the UK, and it continues to advise that anyone noticing a change to their periods that persists over several of cycles, or who has any new vaginal bleeding after the menopause, be treated according to the usual clinical pathways."
Anyone who is concerned about their period - before or after the vaccine - should always seek medical advice and ensure their issues are fully investigate to rule out any underlying health conditions such as PCOS, endometriosis, adenomyosis or pelvic congestion syndrome.
