Study: Covid vaccine did not lead to more menstrual disorders

Women vaccinated against COVID-19 did not seek medical attention for menstrual disorders more often than others, according to a Swedish study.

Since the start of the COVID-19 vaccination, there have been reports of women suffering from menstrual disorders.

Last fall, the European Medicines Agency’s (EMA) Committee on Safety of Medicines recommended that heavy menstrual bleeding be added as a possible side effect to the mRNA vaccine Comirnaty (Pfizer/Biontech) and Spikevax (Moderna).

Researchers from the Swedish Medical Products Agency and the University of Gothenburg have now reviewed data from Swedish registers, including more than 3 million women. The study, published in the journal BMJ, does not show any increased risk, measured as medical contact, due to menstrual disorders after vaccination.

However, the study did show a small increase in the risk of contacting a doctor for postmenopausal bleeding.

Women vaccinated with Vaxzevria (Astra Zeneca) were also included. The researchers took into account factors such as age, socioeconomics and previous healthcare utilization.

According to the researchers, the findings show that although women may have had symptoms, they have not been severe enough to lead to a visit to the doctor.

In June, the EMA concluded that it was not possible to establish a link between missed periods and mRNA vaccines.