Latar Belakang: Banyak masyarakat yang masih menganggap gangguan psikologis ibu termasuk hal yang wajar sehingga postpartum blues ini menjadi suatu gejala yang sulit di deteksi. Salah satu faktor yang dapat menyebabkan terjadinya Postpartum Blues adalah kurangnya kadar hormon esterogen dan progesteron dalam tubuh perempuan dengan cepat setelah melahirkan, kelelahan, kurang tidur, mudah marah, merasa cemas, serta kurangnya perhatian dari suami atau keluarga. Metode: Pada penelitian ini menggunakan desain penelitian deskriptif dengan pendekatan cross sectional. Waktu penelitian pada bulan Oktober sampai Desember 2024 di Desa Sidan. Populasi dalam penelitian ini sebanyak 108 responden. Sampel sebanyak 108 responden diambil menggunakan teknik total populasi. Alat pengumpulan data berupa kuesioner dan diolah menggunakan statistik deskriptif untuk menghasilkan distribusi frekuensi dan presentase. Hasil: Hasil penelitian menunjukkan bahwa sebagian besar ibu hamil memiliki tingkat pengetahuan baik sebanyak 64 responden (59.3%), sedangkan ibu hamil dengan tingkat pengetahuan cukup sebanyak 25 responden (23.1%), dan ibu hamil dengan tingkat pengetahuan rendah sebanyak 19 responden (17.6) Kesimpulan: Sebagian besar responden memiliki pengetahuan baik, namun responden yang memiliki pengetahuan kurang baik diharapkan dapat meningkatkan pengetahuan dan aktif dalam kegiatan yang dilaksanakan oleh Puskesmas Gianyar I untuk meminimalisir terjadinya Postpartum Blues. Kata Kunci: Postpartum Blues, Pengetahuan, Ibu hamil

Background: Postpartum blues is a symptom that is hard to identify in pregnant women since many people still view psychiatric illnesses in mothers as normal. Postpartum Blues could be caused by decreased levels of estrogen and progesterone in the body of a woman immediately following childbirth, along with fatigue, lack of sleep, irritability, feeling anxious, and lack of attention from husband or family. Method: This study employed descriptive research design with cross sectional approach. This study was conducted at Sidan Village from October to December 2024. The population were 108 respondents which were taken using total population technique. The data were collected by using questionnaire and analyzed using descriptive statistics to obtain frequency distributions and percentages. Result: The findings showed that the majority of the pregnant women as many as 65 respondents (59.3%) had good knowledge level, there were 25 respondents (23.1%) had moderate knowledge level, and there were 19 respondents (17.6%) had poor knowledge level. Conclusion: The majority of the respondents have good knowledge. In order to reduce the incidence of postpartum blues, respondents with inadequate knowledge are asked to increase their understanding and participate actively in programs conducted by the Gianyar I Health Center. Keywords: Postpartum Blues, Knowledge, Pregnant Women