Sumaira Nadeem, Madiha Fatima, Samia Rafique, Ayesha Abdul Sattar. Frequency of Preterm Birth in Pregnant Female Residents and Impact of Working Hours on Preterm Birth. Pakistan Journal of Medical & Health Sciences [Internet]. 2023 Mar. 24 [cited 2024 Sep. 19];17(03):97. Available from: https://mail.pjmhsonline.com/index.php/pjmhs/article/view/4254