Hala Thabet et al. showed that women who receive the COVID mRNA vaccine may experience menstrual abnormalities, such as a significant difference in cycle length, flow duration, menstrual blood loss

and dysmenorrhea severity before and after receiving the first, second, and third doses of the vaccine. menstrual disturbance was reported by (44.4%) of those who received the COVID vaccination

‘Result: The results showed that most of the participants were aged between 18-24 years, unmarried, and had normal BMI (47.6%, 52.6% &50.7% respectively).  A menstrual disturbance was reported by (44.4%) of those who received the COVID-19 vaccination, results indicate that there was found a significant relationship between the duration of flow, menstrual blood loss, and severity of dysmenorrhea before and after receiving the first, second, and third doses of Covid19- vaccine, where the p-value of the test (0.000) was less than 0.05. Conclusion: The present study concluded that women who receive the Covid-19 vaccine may experience menstrual abnormalities, such as a significant difference in cycle length, flow duration, menstrual blood loss, and dysmenorrhea severity before and  after  receiving  the  first,  second,  and third doses of  the vaccine. While no significant difference between different types of COVID-19 vaccines (Pfizer, Moderna, and Oxford/AstraZeneca) and menstrual abnormalities.’

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