References
- Heath VC, Southall TR, Souka AP, et al. Cervical length at 23 weeks of gestation: prediction of spontaneous preterm delivery. Ultrasound Obstet Gynecol 1998;12:312–17
- Celik E, To M, Gajewska K, et al; Fetal Medicine Foundation Second Trimester Screening Group. Cervical length and obstetric history predict spontaneous preterm birth: development and validation of a model to provide individualized risk assessment. 2. Ultrasound Obstet Gynecol 2008;31:549–54
- Fonseca EB, Celik E, Parra M, et al; Fetal Medicine Foundation Second Trimester Screening Group. Progesterone and the risk of preterm birth among women with a short cervix. N Engl J Med 2007;357:462–9
- Hassan SS, Romero R, Vidyadhari D, et al; PREGNANT Trial. Vaginal progesterone reduces the rate of preterm birth in women with a sonographic short cervix: a multicenter, randomized, double-blind, placebo-controlled trial. Ultrasound Obstet Gynecol 2011;38:18–31
- Dodd JM, Jones L, Flenady V, et al. Prenatal administration of progesterone for preventing preterm birth in women considered to be at risk of preterm birth. Cochrane Database Syst Rev 2013;7:CD004947
- Souka AP, Papastefanou I, Michalitsi V, et al. Cervical length changes from the first to second trimester of pregnancy, and prediction of preterm birth by first-trimester sonographic cervical measurement. J Ultrasound Med 2011;30:997–1002
- Greco E, Lange A, Ushakov F, et al. Prediction of spontaneous preterm delivery from endocervical length at 11 to 13 weeks. Prenat Diagn 2011;31:84–9
- Greco E, Gupta R, Syngelaki A, et al. First-trimester screening for spontaneous preterm delivery with maternal characteristics and cervical length. Fetal Diagn Ther 2012;31:154–61
- Conoscenti G, Meir YJ, D'Ottavio G, et al. Does cervical length at 13–15 weeks' gestation predict preterm delivery in an unselected population? Ultrasound Obstet Gynecol 2003;21:128–34
- Berghella V, Talucci M, Desai A. Does transvaginal sonographic measurement of cervical length before 14 weeks predict preterm delivery in high-risk pregnancies? Ultrasound Obstet Gynecol 2003;21:140–4
- Carvalho MH, Bittar RE, Brizot ML, et al. Cervical length at 11–14 weeks' and 22–24 weeks' gestation evaluated by transvaginal sonography, and gestational age at delivery. Ultrasound Obstet Gynecol 2003;21:135–9
- Parra-Cordero M, Sepúlveda-Martínez A, Rencoret G, et al. Is there a role for cervical assessment and uterine artery Doppler performed during the first trimester of pregnancy as a screening test for spontaneous preterm delivery? Ultrasound Obstet Gynecol 2014;43:291–6
- Sananès N, Schuller E, Gaudineau A, et al. What is predictive of preterm delivery in the first trimester: isthmus or cervical length? Prenat Diagn 2013;33:894–8
- Antsaklis P, Daskalakis G, Pilalis A, et al. The role of cervical length measurement at 11-14 weeks for the prediction of preterm delivery. J Matern Fetal Neonatal Med 2011;24:465–70
- Souka AP, Papastefanou I, Michalitsi V, et al. A predictive model of short cervix at 20-24 weeks using first-trimester cervical length measurement and maternal history. Prenat Diagn 2011;31:202–6
- Shalev J, Mashiach R, Bar-Chava I, et al. The 'virtual' cervical internal os: diagnosis during the first trimester of pregnancy. Ultrasound Obstet Gynecol 2003;21:145–8
- Szychowski JM, Owen J, Hankins G, et al; Vaginal Ultrasound Cerclage Trial Consortium. Timing of mid-trimester cervical length shortening in high-risk women. Ultrasound Obstet Gynecol 2009;33:70–5
- Brown JA, Pearson AW, Veillon EW, et al. History- or ultrasound-based cerclage placement and adverse perinatal outcomes. J Reprod Med 2011;56:385–92
- Oxlund BS, Ørtoft G, Brüel A, et al. Cervical collagen and biomechanical strength in non-pregnant women with a history of cervical insufficiency. Reprod Biol Endocrinol 2010;8:92
- Ball E, Bulmer JN, Ayis S, et al. Late sporadic miscarriage is associated with abnormalities in spiral artery transformation and trophoblast invasion. J Pathol 2006;208:535–42
- Goya M, Pratcorona L, Merced C, et al; Pesario Cervical para Evitar Prematuridad (PECEP) Trial Group. Cervical pessary in pregnant women with a short cervix (PECEP): an open-label randomised controlled trial. Lancet 2012;379:1800–6