Abdelrazik Elsayed Abdelrazik. “Ferritin and Evaluation of Maternal Serum Ferritin Concentrations As a Predictor of Preterm Labour”. The International Journal of Multiphysics, vol. 18, no. 3, Sept. 2025, pp. 3644 -55, https://www.themultiphysicsjournal.com/index.php/ijm/article/view/1997.