Sharmila, Vijayan, and Thirunavukkarasu Arun Babu. “Evaluation of Reasons for Participation Refusal Among Pregnant Women in a Perinatal Outcome Research”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 9, no. 6 (May 27, 2020): 2403–2407. Accessed December 4, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/7332.