That 78% of the more than 14,000 Spaniards included in a study by University of Granada (UGR) have experienced slight changes in premenstrual and menstrual symptoms after receiving the Covid-19 vaccine. That EVA projectwhich began just over a year ago with the impetus of three healthcare companies, has uncovered what these changes are and how they have affected women.
78% of more than 14,000 Spanish women studied experienced mild changes in premenstrual and menstrual symptoms after the Covid-19 vaccination
The conclusions of the study indicate that the women reporting changes are slightly older, particularly over 35 years of age, and the proportion of smokers is slightly higher. The most common changes in premenstrual symptoms are increased fatigue (43%), bloating (37%), irritability (29%), sadness (28%) and headache (28%). The most common changes in menstrual cramps are increased bleeding (43%), pain (41%), delayed menstruation (38%) and fewer bleeding days (34.5%).
It is the first study in the Spanish population to capture the perceived changes in both premenstrual and menstrual symptoms due to the Covid-19 vaccine. “Vaccinated women perceive slight changes at both moments of the cycle. Further studies are needed to describe the physiological mechanisms that explain these changes.«argues Laura Baena.
43% had more bleeding and 41% more pain, while 38% had delayed menses after receiving the Covid-19 vaccine
The study launched a virtual survey for Spanish women who received the full vaccination schedule. Sociodemographic and clinical data were collected. From the type of vaccine administered to the perceived changes in cycle length, such as B. the amount of bleeding, pain, the presence of blood clots and premenstrual symptoms. Almost 23,000 Spaniards took part in the survey. But there were 14,153 that met the research’s inclusion criteria and on which conclusions were drawn.
As the researchers remember The clinical studies of the Covid-19 vaccines did not include registration of possible changes in menstruation. “After the vaccination campaign started, many women noticed changes in their menstrual cycle. For this reason, the EVA project was launched, the aim of which is to determine whether there is a link between the vaccine against the SARS-CoV-2 virus and menstrual disorders.”Baena details.
“Further studies are needed to describe the physiological mechanisms that explain these changes.”
Exactly on July 15 the magazine scientific advances published a to learn over 35,000 premenopausal and postmenopausal women which offered an assessment of the menstrual changes they experienced in the first two weeks after receiving the Covid-19 vaccine.
The work shows that the 42.1% of menstruating respondents said they had heavy menstrual bleeding after receiving the Covid-19 vaccine. Some experienced it within the first seven days, but many others saw changes eight to 14 days after vaccination.
About the same proportion, 43.6%, said their menstrual periods had not changed after vaccination. A smaller percentage, 14.3%, experienced a mixture of no change or an easier flow, the researchers report.