Fitria H, Yusriana N, Rahmadi E. Analysis of Variations in Sleep Patterns Among Pregnant Women and Their Association with the Risk of Premature Birth. ObGyn [Internet]. 2025 Jul. 30 [cited 2026 Jun. 15];3(3):78-87. Available from: https://trigin.pelnus.ac.id/index.php/ObGyn/article/view/271