Latar Belakang. Anemia pada ibu hamil sangat berkaitan dengan mortalitas dan morbiditas pada ibu dan bayi. Anemia pada ibu hamil dipengaruhi oleh pengetahuan, status gizi, kepatuhan mengkonsumsi tablet Fe, dan kemampuan deteksi dini. Tujuan penelitian adalah untuk menganalisis faktor determinan anemia pada ibu hamil di UPTD Puskesmas Mengwi II. Metode. Penelitian menggunakan pendekatan cross sectional dengan teknik penentuan sampel menggunakan metode consecutive sampling. Jumlah sampel 150 yang memenuhi kriteria inkulsi dan eksklusi, pengumpulan data menggunakan kuesioner. Analisis bivariat dengan uji Fisher’s Exact, dan multivariat dengan uji regresi logistik. Hasil. Sebagian besar responden memiliki status gizi normal sebesar 80,7%, tingkat pengetahuan baik 56,0%, kepatuhan konsumsi tablet Fe 51,3%, kemampuan deteksi dini yang baik 90,7%, dan tidak anemia 82,7%. Analisiis bivariat menunjukkan faktor status gizi, pengetahuan, kepatuhan konsumsi tablet Fe, dan kemampuan deteksi dini berhubungan secara signifikan dengan kejadian anemia pada ibu hamil dengan p value

Background. Anemia in pregnancy is closely associated with maternal and infant morbidity and mortality. It is influenced by knowledge, nutritional status, adherence to iron tablet consumption, and early detection ability. This study aims to analyze the determinant factors of anemia among pregnant women at UPTD Mengwi II Public Health Center. Methods. This research applied a cross-sectional design with consecutive sampling technique. A total of 150 pregnant women who met the inclusion and exclusion criteria were selected. Data were collected using a structured questionnaire. Bivariate analysis used Fisher’s Exact Test, while multivariate analysis used logistic regression. Results. The majority of respondents had normal nutritional status (80.7%), good knowledge (56.0%), good adherence to iron tablet consumption (51.3%), good early detection ability (90.7%), and were non-anemic (82.7%). Bivariate analysis showed that nutritional status, knowledge, iron tablet adherence, and early detection ability were significantly associated with anemia among pregnant women (p < 0.05). The main determinant factor of anemia was nutritional status with a regression coefficient of 0.555. Conclusion. Nutritional status, knowledge, adherence to iron tablet consumption, and early detection ability significantly influence the incidence of anemia in pregnant women, with nutritional status identified as the primary determinant. Strengthening education, routine screening, and adequate nutritional intake are essential to prevent anemia. Keywords: Anemia, pregnant women, knowledge, early detection, iron tablet consumption