Iqra Khalid, Wadduha Amin, Shamas Un Nisa, Irum Ibrahim, Sana Nafees, and Shamim Akhtar, “Efficacy of Vaginal Versus Oral Progesterone in Preventing Preterm Birth among Low-Risk Women with a Short Cervix Diagnosed At 20–24 Weeks”, IJPRT, vol. 16, no. 2, pp. 7802–7809, Nov. 2026.