It’s an “Issue of Blood”

Menstrual changes after Covid vaccines

Brenda Roskos

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Menstrual changes after Covid vaccines may be far more common than previously known

A study found that 42% of people with regular menstrual cycles said they bled more heavily than usual after their Covid vaccination.

When adults gained access to Covid vaccines last year, most knew to expect headaches, fatigue, and soreness as side effects.

But some researchers think it’s time to add another common one to the list: temporary menstrual changes. 

An analysis published Friday in the journal Science Advances found that 42% of people with regular menstrual cycles said they bled more heavily than usual after vaccination. Meanwhile, 44% reported no change, and around 14% reported a lighter period. Among nonmenstruating people — those post-menopause or who use certain long-term contraceptives, for example — the study suggests many experienced breakthroughs or unexpected bleeding after their Covid shots.

The survey included over 39,000 people 18 to 80 years old who were fully vaccinated and had not contracted Covid. The study authors cautioned, though, that the percentages do not necessarily represent the rate of menstrual changes in the general population since people who observed a difference were more likely to participate. The survey’s aim was simply to provide evidence for future studies, not to establish cause and effect. 

You can read the rest of the article here. By Sarah Sloat