A large population study has found in preliminary results that after receiving their COVID-19 shots, almost twice as many young Norwegian women have complained of heavier menstrual periods than they have been used to, as well as of irregular intervals or extra pain.
After having processed only 1,264 reports of menstrual disorders following the COVID vaccination, Norway is the first nation to respond to it with a broad population survey.
The major survey by the Norwegian National Institute of Public Health’s (FHI) of the connection between COVID vaccine and menstrual disorders has collected data from more than 60,000 girls and women aged 12-80.
The project manager and FHI doctor Lill Trogstad said that the study recorded a plethora of menstrual disorders after the first or second dose of various COVID-19 vaccines, including heavy or prolonged bleeding.
The preliminary data that has been published represents women aged 18–30 years, 13,6 percent of which said they experienced heavy bleeding after vaccination – compared to the7.6 percent before vaccination- and that percentage has additionally increased to 15.3 percent after the second dose.
According to the pre-study data, 59.4% of the women participating in the research have received Pfizer as the first dose, 35.8% received Moderna, 4.7 percent got AstraZeneca, and 0.2 percent J&J. For the second dose, 47.4% got Pfizer and 52.6% received Moderna.
On top of the heavier and prolonged bleedings, among the most frequently reported symptoms were also the unusually short or long intervals, unexpected intermitted bleeding, extra painful periods, as well as menstrual pain without bleeding.
FHI has, in the meantime, listed a number of tips based on the preliminary results of the study for women that have experienced menstrual disorders, including postponing the second dose until the symptoms have passed r the cause of the disorders has been investigated.
Other international studies show that women across the world began to report bleeding disorders in the summer of 2021, after receiving a COVID vaccine.
A similar study in Denmark has shown that in a time frame of just several weeks, the number of women reporting menstrual disorders has climbed from several dozen to over a thousand, which have later risen to over 3.900.
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