Background. Badan Pusat Statistik (BPS) recorded that in 2020-2022, 8.35% of women of reproductive age in Indonesia used IUD Cu T-380A as their contraception choice, making it the fourth most commonly used contraceptive method in Indonesia. Acceptors of IUD T-380A experiencing increased risk of vaginal ecosystem imbalance, or known as bacterial vaginosis. This study aims to determine the relati…