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2. Eunice Kennedy Shriver National Institute of Child Health and Human Development. Item of interest: NIH funds studies to assess potential effects of COVID-19 vaccination on menstruation. 2021. https://www.nichd.nih.gov/newsroom/news/083021-COVID-19-vaccination-menstruation
3. Association Between Menstrual Cycle Length and Coronavirus Disease 2019 (COVID-19) Vaccination
4. The two FIGO systems for normal and abnormal uterine bleeding symptoms and classification of causes of abnormal uterine bleeding in the reproductive years: 2018 revisions
5. Increased Occurrence of Menstrual Disturbances in 18- to 30-Year-Old Women after COVID-19 Vaccination