A recent study claims that there is a connection between Covid-19 vaccines and menstrual cycle length. They discovered that covid-19 vaccines are the reason to extend menstrual cycle length. However, the experts haven’t found any link between Coronavirus vaccines and clinically proven changes in the menstrual cycle. Some people hesitate to receive vaccinations by thinking it is associated with abnormal menstrual cycles. Menstruation is the removal of the thick lining of the uterus also known as the endometrium. It eliminates the body through the vagina.

Is It True That Menstrual Changes After Covid-19 Vaccination?

Scientists started to examine the connection between abnormal menstrual cycles and the Covid-19 vaccine because of anecdotal reports found on social media about VAERS (Vaccine Adverse Event Reporting System). Researchers stated that the reports might lead to vaccine hesitancy that is why more evidence is required to prove whether people who menstruate have any side effects or not because of the Covid-19 vaccine.

Regular menstruation is considered a sign of fertility and health. Alison Edelman, MD, a professor of obstetrics and gynecology at Oregon Health & Science University, managed by a group studying data revealed that an investigation on almost 24,000 menstrual cycles was reported by around 4,000 women from the United States. This study discovered that Coronavirus vaccination was connected to a less than 1-day difference in menstrual cycles length after being fully vaccinated than those who had pre-vaccine cycles. Covid-19 vaccines have no side effects on the actual numbers of menstrual bleeding.

The research also examined the menstrual patterns of women aged between 18 to 45 with regular menstrual cycle lengths of 24-28 days for the three consecutive cycles. They examined before the first shot and for three consecutive cycles following the vaccination. The final sample comprised 2,403 vaccinated and 1,556 unvaccinated people.

Among vaccinated women, the research first discovered an average rise in cycle length after the first dose of 71%. They also found 91% of the day following the second dose. After some adjustments, those menstrual cycle increases declined to 64% of a day following the first dose and 79% of the day after dose two.

When they examined unvaccinated women, the research checked at six cycles for the same period and found no changes. This research was published Wednesday in Obstetrics and Gynecology.

In the rare case that a woman got two vaccine doses within the same menstrual cycle and they found two days difference in the menstrual cycle. These differences occur to end swiftly as soon as the next cycle after getting the doses. They do not show any symptoms for the long-term physical or reproductive health concern, stated scientists.

According to the women’s reports, menstrual date differences after the vaccination are more common. For example, heavy bleeding can happen and this is a temporary change. Edelman stated in an interview that these findings need more reassuring and validating information to justify it. These temporary changes in the menstrual period have no side effects on reproductive health or long-term physical health, so people neither avoid vaccination nor worry about pregnancy. As per the International Federation of Gynecology and Obstetrics, differences in menstrual cycle length of fewer than 8 days are considered normal, explained Christine Metz, Ph.D., at the Feinstein Institutes for Medical Research in Manhasset, New York,