Latar Belakang: Kontrasepsi merupakan tindakan yang membantu individu atau pasangan suami-istri untuk menghindari kelahiran yang tidak diinginkan. Faktorfaktor yang mempengaruhi akseptor KB dalam pemilihan alat kontrasepsi IUD antara lain : usia, pengetahuan, tingkat pendidikan, paritas, jumlah anak, jarak kelahiran anak, status pernikahan, riwayat kehamilan, usia anak, perencanaan kehamilan, sikap ibu, jarak akses pelayanan, dukungan suami/keluarga, dukungan tenaga kesehatan, serta informasi tentang IUD dari media Tujuan: Mengetahui faktor-faktor yang mempengaruhi ibu dalam pemilihan IUD sebagai metode kontrasepsi pasca salin di ruang budaga rumah sakit umum daerah klungkung. Metode: Penelitian ini adalah penelitian desktiptif menggunakan rancangan cross sectional, populasi dalam penlitian ini sebanyak 100 orang. Sampel sebanyak 100 ibu. Metode sampling yaitu dengan total sampling. Alat pengumpulan data menggunakan kuesioner. Uji validitas dengan face validity. Analisis dengan univariat yitu menjabarkan variabel dengan distribusi frekuensi dalam bentuk presentase. Analisis bivariat dengan Chi square Hasil: Hasil uji chi sqaure didapatkan q= 0,000 artinya ada hubungan antara umur, pendidikan, paritas, pengetahuan ibu dalam pemilihan kontrasepsi iud sebagai metode kontrasepsi pasca salin di ruang Budaga RSUD Klungkung. Kesimpulan: Ada hubungan antara umur, pendidikan, paritas, pengetahuan ibu dalam pemilihan kontrasepsi iud sebagai metode kontrasepsi pasca salin di ruang Budaga RSUD Klungkung. Kata Kunci: umur, pendidikan, paritas, pengetahuan, IUD, kontrasepsi pasca salin

Background. Contraception assists individuals or reproductive couples in avoiding unwanted births. Factors influencing acceptors in selecting the intrauterine device (IUD) include age, knowledge, education level, parity, number of children, birth spacing, marital status, pregnancy history, child’s age, pregnancy planning, maternal attitude, service access distance, spouse/family support, health worker support, and IUD information from the media. The purpose of this study was to determine the factors affecting mothers in choosing IUD as a postplacental contraceptive method in the Budaga ward of Klungkung Hospital. Method. This study employed a descriptive research design with a cross-sectional approach. The population comprised 100 mothers in the Budaga ward. In this study, all 100 respondents were recruited as a sample through total sampling. Data were collected using a structured questionnaire and validated through face validity. Univariable analysis described each variable using frequency distribution presented as percentages, while bivariate analysis was conducted with the chisquared test. Results. The Chi-Square test yielded p = 0.000, indicating a significant correlation between maternal age, education, parity, and knowledge in selecting IUD as a postplacental contraceptive method at the Budaga ward of Klungkung Hospital. Conclusion. There is a significant correlation between age, education, parity, and maternal knowledge in the selection of IUD for postplacental contraception in the Budaga ward of Klungkung Hospital. Keywords: Age, Education, Parity, Knowledge, IUD, Postplacental Contraception