Is missed period due to side effects of Covid vaccine?

Question
Hello doctor,
I had my period on the last day of July 27, 2021. On August 11, 2021, I had the 1st dose of covid vaccination (Astrazeneca drug). But by the period is August 27, 2021, I do not see my period and until now on September 8, 2021, I still have not had it. Before, my period was quite regular, if there was only a few days difference. I bought a test strip and I'm not pregnant, I just had the last gynecological examination on 19/07/2021, it's normal. So the doctor asked me, is my period late due to side effects after the
Covid vaccine? Thank you!
Anonymous customer
Answer
Answered by Specialist I Truong Thi Phuong - Obstetrician and Gynecologist - Department of Obstetrics and Gynecology - Vinmec Ha Long International Hospital.
Hello,
With the question "Is the delay of period due to side effects after Covid vaccine? ", the doctor would like to answer as follows:
Late period can be caused by many reasons such as pregnancy, thyroid disease, hormonal drugs, stress... In case your test is negative, there is no possibility pregnancy, however, it is still accurate to have a beta hCG blood test as the most standard.
Astrazeneca vaccine does not work to delay your period, your case may be psychological. Life often has changes such as changing residence, work, too much anxiety or stress can also cause missed periods. Vaccination can also have psychological effects causing hormonal changes and missed periods. Please feel free to relax, if necessary, go directly to the medical facility for an ultrasound and blood test to check more.
If you still have questions about a late period, you can go to a hospital under Vinmec Health System for further examination and advice. Thank you for trusting and sending questions to Vinmec. Wishing you lots of health.
Best regards!