Pioneering study identifies changes in menstrual cycle with COVID-19 vaccines

A pioneering study by the University of Granada (UGR), in Spain, identified changes in the menstrual cycle caused by vaccines against COVID-19 that affect cycle duration, cause pain or various premenstrual symptoms.

The EVA project, from the University of Granada, in which nearly 23,000 women participated, identified small changes in premenstrual and menstrual cycles related to SARS CoV-2 coronavirus vaccines.

The study launched a hypothetical survey of Spanish women who received the full vaccination, which allowed for the collection of sociodemographic and clinical data on the type of vaccine given and changes detected regarding cycle duration, amount of bleeding, pain, presence of clots and premenstrual symptoms.

According to the published data, 78% of participants felt changes Premenstrual and menstrual symptoms after vaccination.

From the overall sample, women who reported changes were slightly older, especially with Over 35 years old. Changes occurred in smoking women.

in Most prevalent changes In premenstrual symptoms increased fatigue (43%), bloating (37%), irritability (29%), sadness (28%) and headache (28%), while the most frequent PMS symptoms were an increase in the amount of bleeding (43%). ), pain (41%), delayed menstruation (38%) and fewer days of bleeding (34.5%).

“Clinical trials to develop vaccines against covid did not include recording potential changes in the premenstrual period and menstruation after doses were given,” recalled researcher from UGR’s Department of Nursing Laura Baena García, who coordinated the work.

Baina noted that after the vaccination campaign, many women discovered changes in their menstrual cycle, which spurred this research project aimed at determining if there is a link between the vaccine and menstrual disorders.

The EVA project is the first study in the Spanish community that analyzes the changes observed in premenstrual and menstrual symptoms after Covid vaccines.

Baena sums up, “Vocated women notice slight changes at both moments of the cycle. But more studies are needed to describe the physiological mechanisms that explain these changes.”