Question:
Can COVID-19 vaccines affect the menstrual cycle (period)?
Answer:
Recent studies have shown that people who menstruate may observe small, temporary changes in menstruation after COVID-19 vaccination, including:
- Longer menstrual periods.
- Shorter time between periods.
- Heavier bleeding than usual.
Despite these temporary changes in menstruation, there is no evidence that COVID-19 vaccines cause fertility problems.
Date last reviewed:
Tuesday, Feb 14, 2023