References
- Guo ZK, Ma JM, Gan L, et al. [Preterm birth and preterm infants in Beijing regional district]. Chin J Obstet Gynecol. 2010;45:99–103. (Chinese).
- Blencowe H, Cousens S, Chou D, et al.; Born Too Soon Preterm Birth Action Group. Born too soon: the global epidemiology of 15 million preterm births. Reprod Health. 2013;10(Suppl 1):S2. doi:10.1186/1742-4755-10-S1-S2
- Ness A, Visintine J, Ricci E, Berghella V. Does knowledge of cervical length and fetal fibronectin affect management of women with threatened preterm labor? A randomized trial. Am J Obstet Gynecol. 2007;197:426.e1–7. doi:10.1016/j.ajog.2007.07.017
- Slager J, Lynne S. Assessment of cervical length and the relationship between short cervix and preterm birth. J Midwifery Womens Health. 2012;57(Suppl 1):S4–11. doi:10.1111/j.1542-2011.2012.00209.x
- Vink J, Feltovich H. Cervical etiology of spontaneous preterm birth. Semin Fetal Neonatal Med. 2016;21:106–112. doi:10.1016/j.siny.2015.12.009
- Hu YL. [Guidelines for clinical diagnosis and treatment of premature birth (2014)]. Chin J Obstet Gynecol. 2014;49:481–485. (Chinese).
- Kagan KO, Sonek J. How to measure cervical length. Ultrasound Obstet Gynecol. 2015;45:358–362. doi:10.1002/uog.14742
- Goldenberg RL, Culhane JF, Iams JD, Romero R. Epidemiology and causes of preterm birth. Lancet. 2008;371:75–84. doi:10.1016/S0140-6736(08)60074-4
- Qu SH, Shi CY, Chen Q, et al. [Predictive value of cervical length by transvaginal sonography for preterm pregnancy during mid-and late-trimester of pregnancy]. Chin J Obstet Gynecol. 2011;46:748–752. (Chinese).
- Celik E, To M, Gajewska K, Smith GC, Nicolaides KH; 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. Ultrasound Obstet Gynecol. 2008;31:549–554. doi:10.1002/uog.5333
- Berger R, Abele H, Bahlmann F, et al. Prevention and Therapy of Preterm Birth. Guideline of the DGGG, OEGGG and SGGG (S2k Level, AWMF Registry Number 015/025, February 2019) - Part 1 with recommendations on the epidemiology, etiology, prediction, primary and secondary prevention of preterm birth. Geburtshilfe Frauenheilkd. 2019;79:800–812. doi:10.1055/a-0903-2671
- Dilek TU, Yazici G, Gurbuz A, et al. Progressive cervical length changes versus single cervical length measurement by transvaginal ultrasound for prediction of preterm delivery. Gynecol Obstet Invest. 2007;64:175–179. doi:10.1159/000106486
- Larma JD, Iams JD. Is sonographic assessment of the cervix necessary and helpful? Clin Obstet Gynecol. 2012;55:324–335. doi:10.1097/GRF.0b013e3182487e96
- Zhi MC, Zhao XY, Li ZA, Li W. [Study on the correlation between premature labor and universal screening transvaginal ultrasound cervical length in second trimester]. Chin Med Rec. 2019;20:99–102. (Chinese).
- Jiang X, Ying H. [Research progress on the correlation between maternal microflora and spontaneous preterm delivery]. Chin J Obstet Gynecol. 2019;54:706–709. (Chinese).
- Salomon LJ, Diaz-Garcia C, Bernard JP, Ville Y. Reference range for cervical length throughout pregnancy: non-parametric LMS-based model applied to a large sample. Ultrasound Obstet Gynecol. 2009;33:459–464. doi:10.1002/uog.6332
- Chen JY, Fan XD, Chen Q, et al. [Consecutive measurement of cervical length during uncomplicated pregnancy through transvaginal ultrasound]. Chin J Perinat Med. 2012;15:16–19. (Chinese).
- 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. doi:10.1002/uog.9017