Adverse Menstrual Events Reported After and Before (or Without) COVID-19 Vaccination: A Systematic Review and Meta-Analysis of Comparative Observational Studies.
Frank PeinemannDoris OberleUrsula Drechsel-BäuerleBrigitte Keller-StanislawskiPublished in: Pharmacoepidemiology and drug safety (2024)
The risk ratio did not favor any group and heterogeneity was prevalent among the studies. Most studies suggested that the reported changes were temporary, minor, and nonserious.