Lara Briden is a naturopathic doctor and author of the best-selling books Period Repair Manual and Hormone Repair Manual. She has 25 years experience in womens health and sits on several scientific advisory committees, including The Centre for Ovulation and Menstruation Research (CeMCOR) at the University of British Columbia. She sees patients in Christchurch, New Zealand, where she treats women with PCOS, PMS, endometriosis, perimenopause, and many other hormone- and period-related health problems.