The secondary research process involved comprehensive analysis of regulatory databases, peer-reviewed medical journals, clinical publications, and authoritative health organizations. Key sources included the US Food & Drug Administration (FDA), European Medicines Agency (EMA), World Health Organization (WHO) Global Health Observatory, National Institutes of Health (NIH), National Center for Biotechnology Information (NCBI/PubMed), Centers for Disease Control and Prevention (CDC), American College of Obstetricians and Gynecologists (ACOG), Royal College of Obstetricians and Gynaecologists (RCOG), International Federation of Gynecology and Obstetrics (FIGO), American Society of Reproductive Medicine (ASRM), European Society of Human Reproduction and Embryology (ESHRE), Office on Women's Health (OWH), National Health Service (NHS) England, Organisation for Economic Co-operation and Development (OECD) Health Statistics, World Bank Health, Nutrition and Population Statistics, IQVIA Institute for Human Data Science, IMS Health (IQVIA) Pharmaceutical Market Data, Global Burden of Disease Study (IHME), and national health ministry reports from key markets including the US, UK, Germany, France, Japan, China, and India. These sources were used to collect epidemiological data on primary and secondary dysmenorrhea prevalence, regulatory approval data for pain relievers (NSAIDs, COX-2 inhibitors), hormonal therapies (oral contraceptives, GnRH agonists), and surgical interventions, clinical safety studies, demographic trends, treatment guidelines, and market landscape analysis across North America, Europe, Asia-Pacific, and Rest of World.