Can the COVID-19 vaccine disrupt your periods or fertility?

COVID-19 Vaccine

As the COVID-19 vaccine is becoming more accessible to the public, many women are reporting changes in their menstrual cycles. Keep reading to learn whether this should be a cause of concern or not, if the vaccine is safe for pregnant women, and more!

The controversy

After receiving the COVID-19 vaccine, many women have reported seeing irregularities in their menstrual cycles, mainly through early/late periods and differences in bleeding. While no cases have been life-threatening up to date, irregular cycles have been an unanticipated side effect for many.

As more women have begun sharing their experiences on social media, conspiracy theories regarding the “dangers” of the vaccine have been propagated as well.

Is it common to experience differences in your period after getting vaccinated? What could this indicate about your menstrual health? Find out below!

Does the COVID-19 vaccine disrupt your menstrual cycles?

Since the COVID-19 vaccine is a new development, research still needs to be done to thoroughly determine the impacts it could have on your menstrual cycles and fertility. While no study has found conclusive results linking the vaccine to menstrual irregularities, it is definitely possible that women may experience such side effects, as the menstrual cycle is highly interconnected to immune health, and changes to your immune system from the vaccine could have subsequent effects on your period as well.

Having a temporary irregular period or experiencing different symptoms in the short term should not be a cause for concern in most women. If bleeding gets increasingly heavy, or a woman has to go to the emergency room, which has not been recorded yet, there may be a greater need for medical attention.

The lack of research surrounding menstruation and vaccines isn’t unique to COVID-19; unfortunately, many studies involving new drugs and pharmaceuticals are only tested on women who are on contraceptives, making it more difficult to determine their impacts on your cycles. 

While more research needs to be done, experts agree that there is no current cause for concern, and women should not let the fear of irregular cycles prevent them from getting vaccinated.

Does being around vaccinated individuals increase your chance of experiencing changes in reproductive health?

The short answer: No. The idea that the vaccine can “shed” from one person to another or cause menstrual irregularities in women who are around vaccinated individuals has been proven to be a conspiracy theory that lacks scientific evidence.

The vaccine response is unique to an individual and cannot spread from one person to another. Individuals cannot transmit the vaccine to people in their proximity, and therefore, side effects cannot be transferred as well.


While you may experience changes in your cycle after receiving the vaccine, the same cannot be said for unvaccinated women who spend time with vaccinated individuals. There is also no evidence that the vaccine could negatively impact women who are pregnant or are seeking to conceive in the future.

It is extremely important to be aware of facts vs. rumours when discussing your health and the COVID-19 vaccine. Make sure to consult reputable sources and scientific evidence to avoid being influenced by conspiracy theories!

Is the vaccine safe for pregnant women?

As mentioned above, the rumour that the COVID-19 vaccine could cause infertility has no scientific basis. Experts from the American College of Obstetricians and Gynecologists (ACOG), have repeatedly stated that the vaccine should continue to be available to pregnant women or those who are trying to become pregnant. 


The theory that the vaccine causes infertility has been proven to be false in the past with the HPV vaccine, and current studies do not show that there is any cause for concern with the COVID-19 vaccine. A preliminary study has shown no correlation between pregnancy risk and the COVID-19 vaccine, although more research needs to be done to definitively analyze its impacts on infant outcomes.

If history is any indicator, however, experts do not expect to see dangers to fertility come as a result of vaccinations. 

After reading this article, what are your thoughts on taking the COVID-19 vaccine? Let us know what you’ve learned and what questions you have!

Subscribe to The Waiting Room

Receive updates on educational content and relevant news to help you navigate your hormonal health wellness.


Latest Articles

Subscribe to The Waiting Room

Receive updates on educational content and relevant news to help you navigate your hormonal health wellness.

Related Posts
Scroll to Top
Scroll to Top