Jerilynn C. Prior BA, MD, FRCPC is a Professor Emerita of Endocrinology and Metabolism at the University of British Columbia researching with community women+ the endocrinology of women’s reproduction, menstrual cycles and the prevalence of ovulation and its disturbances. Her work shows profound implications of Subclinical Ovulatory Disturbances that silently interferes with quality of life and healthy aging. She was inducted into the Vancouver Coastal Health Hall of Honour in 2023 and was the 2019 recipient of the Michael Smith Foundation for Health Research Aubrey J. Tingle Clinician-Scientist award. She is the founder (2002) and Scientific Director of the UBC Centre for Menstrual Cycle and Ovulation Research, a key producer of CeMCOR’s popular website www.cemcor.ubc.ca and her concept-changing research is frequently cited (H-Index 79). Professor Prior is a leader in understanding perimenopause as a time of chaotic transition that is sometimes very symptomatic but ends in a natural, calm and largely asymptomatic menopause. She wrote the award-winning novel, Estrogen’s Storm Season: Stories of Perimenopause (2005, 2nd ed. 2018), to inform/empower midlife women and co-authored The Estrogen Errors—why progesterone is better for women’s health (Praeger, London, 2009) with Susan Baxter, PhD.