Background  Short cervical length (CL) has not been shown to be adequate as a single predictor of spontaneous preterm birth (sPTB) in high-risk pregnancies. Objective  The objective of this study was to evaluate the performance of the mid-trimester cervical consistency index (CCI) to predict sPTB in a cohort of high-risk pregnancies and to compare the results with those obtained with the CL. Study Design  Prospective cohort study including high-risk singleton pregnancies between 19 +0 and 24 +6 weeks. The ratio between the anteroposterior diameter of the uterine cervix at maximum compression and at rest was calculated offline to obtain the CCI. Results  Eighty-two high sPTB risk women were included. CCI (%) was significantly reduced in women who delivered <37 +0 weeks compared with those who delivered at term, while CL was not. The area under the curve (AUC) of the CCI to predict sPTB <37 +0 weeks was 0.73 (95% confidence interval [CI], 0.61–0.85), being 0.51 (95% CI, 0.35–0.67), p  = 0.03 for CL. The AUC of the CCI to predict sPTB <34 +0 weeks was 0.68 (95% CI, 0.54–0.82), being 0.49 (95% CI, 0.29–0.69), p  = 0.06 for CL. Conclusion  CCI performed better than sonographic CL to predict sPTB. Due to the limited predictive capacity of these two measurements, other tools are still needed to better identify women at increased risk.

The prevalence of fecal incontinence is high during pregnancy with a notable impact on quality of life. There was no specific clinical pattern during pregnancy that could define patients at risk for fecal incontinence during this period of life.

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Electronic poster abstractsWith the ANOVA analysis it can't be obtained among which groups the difference is statistically significative. When we use the Tukey's test for multiple comparison, we note that the only statistically significative differences are among the group without genital prolapse and the groups with degree 2 or more. Conclusions: There are some discordances between symptoms and the prolapse degree objectified during clinical examination. The ultrasound could help us to discriminate which patients with an increased area of hiatus may benefit from surgery.P32.04 2D-transperineal ultrasound for obstetric anal sphincter injuries assessment in a maternal fetal medicine department