Study identifies changes in menstruation due to covid vaccine

A pioneering study from the University of Granada has identified alterations in menstruation derived from covid-19 vaccines. Affect cycle length, pain, or different premenstrual symptoms

University of Granada, nearly 23,000 women from across the country took part. After the study, slight alterations were identified in the premenstrual and menstrual cycles linked to the vaccines against the coronavirus.

The study launched a virtual survey for Spanish women who received the full vaccination schedule. It made it possible to collect socio-demographic and clinical data on the type of vaccine administered. Data on perceived changes in cycle length, amount of bleeding, pain, presence of clots and premenstrual symptoms were also collected.

Conclusions of the study on menstruation and the coronavirus

The 78% of participants perceived changes in premenstrual and menstrual symptoms after administration of the vaccine.

Among the total sample, women who reported alterations are somewhat older, particularly those over 35. They also occur slightly more in female smokers.

The most frequent alterations in premenstrual symptoms are greater fatigue (43%), bloating (37%), irritability (29%), sadness (28%) and headaches (28%). On the other hand, the most frequent menstrual symptoms are a greater amount of bleeding (43%), pain (41%), delayed menstruation (38%) and fewer bleeding days (34.5%).

“The clinical trials carried out for the development of vaccines against covid did not include the recording of possible premenstrual and menstrual changes after the administration of the doses”, recalled the researcher from the nursing department of the UGR Laura Baena Garciawho is leading this work.

Baena recalled that after the vaccination campaign, many women detected changes in their menstrual cycle. For this reason, this research project to determine if there is a relationship between the vaccine and menstrual disorders has been promoted.

The EVA project is the first study in the Spanish population that collects perceived changes in premenstrual and menstrual symptoms derived from the covid vaccine.

“Vaccinated women perceive slight alterations at both times of the cycle. Further studies are needed to describe the physiological mechanisms that explain these alterations,” summarized Baena.

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