Kaundal, A. “Unveiling the Role of Pregnancy Associated Plasma Protein-A in Idiopathic Preterm Labour: A Review”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 14, no. 10, Sept. 2025, pp. 3636-8, doi:10.18203/2320-1770.ijrcog20253127.