Abstract
INTRODUCTION: Contraceptive methods are widely used, yet their impact on menstrual cycle regularity remains a topic of clinical significance. This study aims to investigate how different contraceptive methods influence menstrual cycle regularity in reproductive-age women. METHODS: A randomized controlled trial was conducted on 300 women, aged 18-45, categorized into three groups: oral contraceptives, intrauterine devices (IUDs), and hormonal implants. Menstrual cycle regularity, defined by the number of cycles within 28-32 days, was assessed over six months. RESULTS: Oral contraceptives resulted in the most regular cycles (P < 0.05), followed by IUDs. Hormonal implants had a higher incidence of irregular cycles. CONCLUSION: Oral contraceptives promote the highest regularity in menstrual cycles, followed by IUDs. Hormonal implants showed higher variability in cycle regularity.