Elasy, A. N., A. M. Farag, and A. M. K. Aboelfath. “Plausibility of the Combination of 17 α Hydroxyprogesterone Injection and Nifedipine Versus Magnesium Sulfate in the Management of Preterm Labor, RCT”. International Journal of Health Sciences, vol. 6, no. S10, Nov. 2022, pp. 759-6, doi:10.53730/ijhs.v6nS10.13602.