References
- Goldenberg RL, Culhane JF, Iams JD, et al. Epidemiology and causes of preterm birth. Lancet. 2008;371:75–84.
- Iams JD, Romero R, Culhane JF, et al. Primary, secondary, and tertiary interventions to reduce the morbidity and mortality of preterm birth. Lancet. 2008;371:164–175.
- Iams JD, Goldenberg RL, Meis PJ, et al. The length of the cervix and the risk of spontaneous premature delivery. National Institute of Child Health and Human Development Maternal Fetal Medicine Unit Network. N Engl J Med. 1996;334:567–573.
- To MS, Skentou CA, Royston P, et al. Prediction of patient-specific risk of early preterm delivery using maternal history and sonographic measurement of cervical length: a population-based study. Ultrasound Obstet Gynecol. 2006;27:362–367.
- Sochacki-Wójcicka N, Wojcicki J, Bomba-Opon D, et al. Anterior cervical angle as a new biophysical ultrasound marker for prediction of spontaneous preterm birth [Letters to the Editor]. Ultrasound Obstet Gynecol. 2015;46:377–378.
- Dziadosz M, Bennett TA, Dolin C, et al. Uterocervical angle: a novel ultrasound screening tool to predict spontaneous preterm birth. Am J Obstet Gynecol. 2016;215:376.e1–7.
- Sepúlveda-Martínez A, Díaz F, Muñoz H, et al. Second-trimester anterior cervical angle in a low-risk population as a marker for spontaneous preterm delivery. Fetal Diagn Ther. 2017;41:220–225.
- Arabin B, Alfirevic Z. Cervical pessaries for prevention of spontaneous preterm birth: past, present and future. Ultrasound Obstet Gynecol. 2013;42:390–399.
- Goya M, Pratcorona L, Merced C, et al. Cervical pessary in pregnant women with a short cervix (PECEP): an open-label randomised controlled trial. Lancet. 2012;379:1800–1806.
- Mendoza M, Goya M, Gascón A, et al. Modification of cervical length after cervical pessary insertion: correlation weeks of gestation. J Matern Fetal Neonatal Med. 2017;30:1596–1601.
- Cannie MM, Dobrescu O, Gucciardo L, et al. Arabin cervical pessary in women at high risk of preterm birth: a magnetic resonance imaging observational follow-up study. Ultrasound Obstet Gynecol. 2013;42:426–433.