COVID-19 Vaccination Side Effects On Women: How the COVID Vaccine May Impact Your Menstrual Period by Lacey Dunn, MS, RD, LD, CPT

Women's Health
2 years ago

COVID-19 Vaccination Side Effects On Women: How the COVID Vaccine May Impact Your Menstrual Period

The COVID-19 vaccine may bring a side effect that women need to be aware of: changes to their menstrual periods. Whether you are on birth control or not, the COVID vaccine may cause period changes, because they are an inflammatory stress response and a normal side effect, just like having a sore arm.

The vaccine may cause:

  • heavier periods
  • increased cramps
  • mid-cycle spotting
  • change to period length
  • a missed period

There's no need to freak out about this. This is a normal response to a stressor on your body, which the vaccine is! As women, our period is our fifth vital sign. If there is any stressor our body, whether internal or external, it signals to our brain and ovaries that it may not be completely be safe to have a baby.

What happens? Our menstrual cycle can change. We may not produce as much progesterone as normal, or we may not even ovulate, which produces our progesterone! Though your period may change, it should regulate back with your next cycle.

The content on is for informational and entertainment purposes only, and should not be considered medical advice. The information on this site should not be used to diagnose or treat a health problem or disease, and is not a substitute for professional care. Always consult your personal healthcare provider. The opinions or views expressed on do not necessarily represent those of 30Seconds or any of its employees, corporate partners or affiliates.

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This is so interesting, thanks for the info. 🙏🏼
Elisa Schmitz
This is so good to know. I'm fascinated by how much our hormones affect our overall health, so it should not be surprising - yet it is because we don't know what we don't know. Many thanks for letting us know about this, Lacey Dunn, MS, RD, LD, CPT , and welcome to 30Seconds. We look forward to learning more from you!
I guess it's a small price to pay for the benefits it brings.

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