(July 15, 2022)
A study found that 42% of people with regular menstrual cycles said they bled more heavily than usual after their Covid vaccination.
The new survey started in April 2021, around the time people began to report unexpected bleeding and heavier flow post-vaccine. However, these anecdotes were at the time met with the rebuttal that there was no data linking menstrual changes to vaccination.
That was both true and indicative of a larger problem. Individuals who took part in Covid vaccine trials were not asked if they experienced menstrual changes.