Association between menstrual cycle pattern regularity and changes in menstrual bleeding following COVID-19 vaccination: secondary analysis of an observational study

Affiliations

• ¹ Department of Obstetrics and Gynecology, Oregon Health & Science University, Portland, Oregon, USA [email protected].
• ² OHSU-PSU School of Public Health, Portland, Oregon, USA.
• ³ Department of Obstetrics and Gynecology, Oregon Health & Science University, Portland, Oregon, USA.
• ⁴ Centro de Investigación en Salud Poblacional (CISP), Instituto Nacional de Salud Publica (INSP), Cuernavaca, Mexico.
• ⁵ Natural Cycles Nordic AB, Stockholm, Sweden.
• ⁶ Department of Obstetrics and Gynecology, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA.
• ⁷ Department of Metabolism Digestion and Reproduction, Imperial College London, London, UK.
• ⁸ Institute for Repair and Regeneration, Centre for Reproductive Health, University of Edinburgh, Edinburgh, UK.
• ⁹ Montpellier Institute of Evolutionary Sciences (ISEM), Montpellier University, Montpellier, France.