Is it unusual to miss a period after receiving the Covid vaccine?

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Question
Hello doctor,
I am currently getting the Covid vaccine, but my period is late. My sister also missed her period 4 months after the injection. The doctor asked me, is it abnormal to miss my period after taking the Covid vaccine?
Anonymous customer
Reply
Hello,
To the question "Is it abnormal to miss a period after taking the Covid vaccine?", the doctor would like to answer as follows:
After vaccination Covid-19 may experience some common side effects such as: swelling, pain, redness at the injection site; fever, chills; headache, joint pain, muscle pain, fatigue, dizziness, nausea, digestive disorders, swollen glands, in some cases rash. Reactions are common 2-7 days after injection. The Covid-19 vaccine can have a blood-clotting reaction 4 to 28 days after injection but does not affect the menstrual cycle. Therefore, you should visit an obstetrician-gynecologist to determine the cause of the missed period and have an appropriate treatment.
If you still have questions about missing your period after receiving the Covid vaccine, you can go to the hospital of Vinmec Health System for further examination and advice. Thank you for trusting and sending questions to Vinmec. Wishing you lots of health.
Best regards!

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