International journal of epidemiology, 51(3), 691-700, 2022 The COVID-19 pandemic and the menstrual cycle: research gaps and opportunities Sharp GC, Fraser A, Sawyer G, Kountourides G, Easey KE, Ford G, Olszewska Z, Howe LD, Lawlor DA, Alvergne A, Maybin JA DOI10.1093/ije/dyab239 PMID34865021 Read at source