Cervical length and relaxin as predictors of preterm birth

Mid‐trimester serum relaxin concentrations and post‐partum pelvic floor dysfunction

“…This study represents a nested study analysis from a prospective cohort study evaluating the relation between SRCs at 24 and 28 weeks and preterm labor, which enrolled mid-trimester women of all parity with singleton fetuses of gestational age confirmed by ultrasound (10).…”

Cervical cerclage for short cervix on transvaginal ultrasound: Review of effectiveness in preventing preterm birth

“…15 It appears that even screening the general obstetric population using transvaginal ultrasound is unlikely to be helpful, as a cohort study of the general population of singleton pregnant women found that cervical length measurement of </= 30 mm had a positive predictive value of only 4.5% for preterm birth. 22 It appears that in singleton gestations, ultrasoundindicated cervical cerclage may be more efficacious in those women with a higher risk obstetrical features such as prior preterm delivery or prior second-trimester loss. Future research should focus on this subgroup of women in order to increase sample sizes and demonstrate treatment effect with better precision.…”