Can COVID-19 vaccines affect menstruation?

Question: 

Can COVID-19 vaccines affect menstruation? 

Answer: 
Research on COVID-19 vaccination and the menstrual cycle is limited. However, results from two recent studies indicate that people may have a small change in menstruation (including changes in cycle length and bleeding) after COVID-19 vaccination, but that these changes are temporary. There continues to be no evidence that COVID-19 vaccines impact fertility.
 
Having COVID-19 itself can also impact the menstrual cycle. So can many other things, including stress, sleep, diet, exercise, and other infections. 
 
If you have any concerns about your menstrual cycle, please speak with your healthcare provider.
 
 
Date last reviewed: 
Wednesday, Mar 16, 2022