Jerilynn C. Prior MD, FRCPC, ABIM, ABEM

Jerilynn Prior is a professor of endocrinology at UBC in Canada. Her work focuses on understanding women’s reproduction (adolescence, menarche, menstrual cycles, ovulation, perimenopause and menopause), what is normal, what can go wrong, and how these influence women’s health.

In 2002, she founded the Centre for Menstrual Cycle and Ovulation Research (CeMCOR), which does innovative research and makes this accessible to women everywhere.

Jerilynn is best known for research showing that progesterone (menstrual hormone produced after ovulation) “works” wherever estrogen does – progesterone is a necessary partner with estrogen. But many regular cycles have too little progesterone (ovulatory disturbances). Progesterone stimulates bone-forming cells to build new bone. Cyclic progesterone is helpful therapy for abnormal cycles and their fracture risks. Progesterone (alone) is effective treatment for menopausal hot flashes, is safe and helps sleep.

Perimenopause is a time of higher/erratic estrogen and lower progesterone levels—progesterone is good treatment.