Preterm Birth Prevention Post-Conization: A Model of Cervical Length Screening with Targeted Cerclage
Fig 2
Mean difference in CL (mean % Δ CL) between time-points A: 13+0–15+6 weeks, B: 16+0–18+6 weeks, C: 20+0–22+6 weeks (A-B, B-C, and A-C) according to delivery outcome and cerclage insertion. In women receiving a cerclage, mean CL started above 25mm at timepoint A, and went on to shorten, most significantly at timepoint C. The greatest difference in CL is observed between timepoints B-C and A-C in those that received a cerclage and went on to deliver preterm <37weeks, followed by term delivery with a cerclage. (% ΔCL = percentage change in CL (mm) between screening time points; PTB = preterm birth <37 weeks; Screening time points = A: 13+0–15+6 weeks, B: 16+0–18+6 weeks, C: 20+0–22+6 weeks; SD = standard deviation; Term = birth >37 weeks; W = weeks).