It also revealed that women who received the vaccines may have a delay of their menstrual cycle, on average, by a day, compared to those who did not receive the vaccine.
The researchers say that the delay was more noticeable when receiving two doses of the vaccine during the same menstrual cycle, as it was two days later than usual.
The scientists examined the records of nearly 4,000 women between the ages of 18 and 45, of whom about 2,400 received the vaccine, and about 1,550 were unvaccinated, and 6 menstrual cycles were followed for each of them.
In those who received the vaccine, the researchers followed the three cycles before and after the vaccination, and compared them to a similar 6-month duration in the women who did not receive the vaccine.
According to the results of the study, the first dose of the vaccine was associated with an increase in the menstrual cycle period by 0.71 days, while this number reached with the second dose to 0.91 days, while the unvaccinated group did not see significant changes over the six months.
But the researchers concluded in their study that the recorded effects are minor, and fade within a month or two.
Commenting on the results of the study, the head of the Department of Obstetrics, Gynecology and Sciences said childbearing at university "Yale" American Hugh Taylor: "The study is one of the first to back up what some women have said about the effect of the vaccine on their menstrual cycles".
Taylor added: "I want to keep people away from Superstitions Incorrect about the effect of the vaccine on fertility, your period may be slightly disturbed for a month or two, but it will not be harmful from a medical point of view".
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The study, whose results were published in the journal,Obstetrics and gynecology‘, increase in period menstruation In women with Corona vaccines compared to those who were not fed.
It also revealed that women who received the vaccines may have a delay of their menstrual cycle, on average, by a day, compared to those who did not receive the vaccine.
The researchers say that the delay was more noticeable when receiving two doses of the vaccine during the same menstrual cycle, as it was two days later than usual.
The scientists examined the records of nearly 4,000 women between the ages of 18 and 45, of whom about 2,400 received the vaccine, and about 1,550 were unvaccinated, and 6 menstrual cycles were followed for each of them.
In those who received the vaccine, the researchers followed the three cycles before and after the vaccination, and compared them to a similar 6-month duration in the women who did not receive the vaccine.
According to the results of the study, the first dose of the vaccine was associated with an increase in the menstrual cycle period by 0.71 days, while this number reached with the second dose to 0.91 days, while the unvaccinated group did not see significant changes over the six months.
But the researchers concluded in their study that the recorded effects are minor, and fade within a month or two.
Commenting on the results of the study, the head of the Department of Obstetrics, Gynecology and Sciences said childbearing At Yale University, Hugh Taylor: “The study is one of the first to support what some women have said about their menstrual cycle being affected by the vaccine.”
Taylor added, “I want to keep people away from Superstitions They are incorrect about the effect of the vaccine on fertility, as they may disturb the menstrual cycle a little for a month or two, but it will not be harmful from a medical point of view.”
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