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CHAPTER 44 Cervical Ultrasound and Preterm Birth 1509

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57. Kusanovic JP, Espinoza J, Romero R, et al. Clinical signiicance of the presence

of amniotic luid ‘sludge’ in asymptomatic patients at high risk for spontaneous

preterm delivery. Ultrasound Obstet Gynecol. 2007;30(5):706-

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59. Mella MT, Mackeen AD, Gache D, et al. he utility of screening for historical

risk factors for preterm birth in women with known second trimester cervical

length. J Matern Fetal Neonatal Med. 2013;26(7):710-715.

60. Hassan SS, Romero R, Vidyadhari D, et al. Vaginal progesterone reduces the

rate of preterm birth in women with a sonographic short cervix: a multicenter,

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61. Fonseca EB, Celik E, Parra M, et al. Progesterone and the risk of preterm

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62. Goya M, Pratcorona L, Merced C, et al. Cervical pessary in pregnant women

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63. Werner EF, Han CS, Pettker CM, et al. Universal cervical-length screening

to prevent preterm birth: a cost-efectiveness analysis. Ultrasound Obstet

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64. Cahill AG, Odibo AO, Caughey AB, et al. Universal cervical length screening

and treatment with vaginal progesterone to prevent preterm birth: a decision

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65. Society for Maternal-Fetal Medicine. Publications Committee. Progesterone

and preterm birth prevention: translating clinical trials data into clinical

practice. Am J Obstet Gynecol. 2012;206(5):376-386.

66. Pramod R, Okun N, McKay D, et al. Cerclage for the short cervix demonstrated

by transvaginal ultrasound: current practice and opinion. J Obstet Gynaecol

Can. 2004;26(6):564-570.

67. Crane JM, Hutchens D. Use of transvaginal ultrasonography to predict preterm

birth in women with a history of preterm birth. Ultrasound Obstet Gynecol.

2008;32(5):640-645.

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