The COVID-19 pandemic has significantly affected our daily lives, from the way we work, socialize, and even access healthcare. Vaccination has been a crucial tool in the fight against the virus, and millions of people around the world have received the vaccine. Like with any vaccine, there have been reports of side effects, and one of the most recent ones is a slight increase in the likelihood of heavier menstrual bleeding after vaccination. This has left many women wondering if this is a cause for concern, and what they can do to mitigate the risk. In this article, we will explore the findings of recent studies on this topic and explore the possible reasons why this occurs. We’ll also provide guidance on how women can manage any discomfort or changes during their menstrual cycles.
According to an observational study published in BJOG, women who received the COVID-19 vaccine have a slightly higher risk of experiencing a heavier menstrual cycle than unvaccinated women. However, these changes typically resolved by the first post-vaccination menstrual cycle. Researchers analysed data from over 9,500 women, of whom 7,401 were vaccinated against COVID-19 and 2,154 were unvaccinated, and tracked their menstrual cycle changes via the digital Natural Cycles app for a minimum of four consecutive menstrual cycles. Women reported their daily bleeding quantity as spotting, light, medium, or heavy. The primary outcome was the mean number of heavy bleeding days and changes in bleeding quantity at first COVID-19 vaccination dose, second dose, and post-exposure menses compared with unvaccinated women. Approximately two-thirds of women reported no change in heavy bleeding days regardless of their vaccination status. However, women who were vaccinated did report an increase in total bleeding quantity compared to unvaccinated women during the first-dose and second-dose menses. The researchers found no significant differences in the number of heavy bleeding days by vaccination status after adjusting for confounding factors. Approximately 40 additional people per 1,000 women with normal menstrual cycles reported greater total bleeding quantity after receiving their first COVID-19 vaccine dose. Blair G. Darney, researcher in the department of obstetrics and gynecology at Oregon Health & Science University and the Population Health Research Center, advised that the findings “shouldn’t be cause for concern but should validate the public’s experiences and provide reassurance that if changes in flow occur with vaccination, they are likely to be small and temporary.”
In summary, while the COVID-19 vaccine has been proven to be effective in protecting individuals against the virus, it is important to also be aware of any possible side effects. With regards to the menstrual cycle, a small increase in likelihood of greater bleeding has been reported by some women after receiving the vaccine. However, it is important to note that this increase is still relatively rare and does not outweigh the benefits of getting vaccinated. If you experience any unusual spotting or bleeding, reach out to your healthcare provider for a thorough evaluation. Ultimately, understanding and monitoring any changes in your menstrual cycle can help you stay informed and healthy.
