Pei Ma et al. 2025. Meta-analysis of the predictive value of ultrasonic measurement of cervical internal orifice width and cervical length for premature delivery. Journal of the Pakistan Medical Association. 75, 7 (July) (Supple-02) (Oct. 2025), S-152-S-157. DOI:https://doi.org/10.47391/JPMA.SRPH-26.