3Andersen HF. Transvaginal and transabdominal ultrasonography of the uterine cervix during pregnancy. J Clin Ultrasound,1991,19:77-83.
4Ahner R, Kiss H, Egarter C, et al. Fetal fibronectin as a marker to predict the onset of term labor and delivery. Am J Obstet Gynecol, 1995,172:134-137.
5Julkunen M, Koistinen R, Aalto-Setala K, eta]. Primary structure of human insulin-like growth factor-binding protein/placental protein 12 and tissue-speciflc expression of its mRNA. FEBS Lett,1988,236:295-302.
6Martina NA, Kim E, Chitkara V, et al. Gestational age-dependent expression of insulin-like growth-factor-binding protein-1 (IGFBP-1) phosphoisoforms in human extraembryonic cavities, maternal serum,and decidua suggests decidua as the primary source of IGFBP-1 in these fluids during early pregnancy. J Clin Endocrinol Metab. 1997.82:1894-1898.
7Nuutila M, Hiilesmaa V, Karkkainen T, et al. Phosphorylated isoforms of insulin-like growth factor binding protein-1 in the cervix as a predictor of cervical ripeness. Obstet Gynecol, 1999,94:243-249.
8Ware V, Raynor BD. Transvaginal ultrasonographic cervical measurement as a predictor of successful labor induction. Am J Obstet Gynecol, 2000,182:1030-1032.
3Chao A S, Chao A, Hsieh P C. Ultrasound assessment of cervical length in pregnancy [J].Taiwan J Obstet Gynecol, 2008,47 ( 3 ) : 291-295.
4Ware V, Raynor B D. Transvaginal ultrasonographic cervical measurement as a predictor of successful labor induction [ J ]. Am J Ohstet Gynecol,2000,182 (5) : 1030-1032.
5Nuutila M,Hiiles maa V,Karkainen T,et al.Phosphrylated isoforms of insulin like growth factor binding protein-1 in the cervix as a predictor of cervical ripness.Obstet Gynecol,1999,94:243 ~ 249.
6Julkunen M,Koistinen R,Aalto-Setala K,et al.Primary structure of human insulin-like growth factor-binding protein/placental protein 12 and tissue-specific expression of its mRNA.FEBS Lett,1988;236:295-302
7Nuutila M,Hiilesmaa V,Karkkainen T,et al.Phosphrylated isoforms of insulin like growth factor binding protein-1 in the cervix as a predictor of cervical ripness.Obstet Gynecol,1999;94:243-249
8Adersen HF.Transvaginal and transabdominal ultrasonography of the uterine cervix during pregnancy.J Clin Ultrasound,1991;19:71
9Rahkonen L, Rutanen EM, Nuutila M, et al. Elevated levels o[ deeidual insulin-like growth factor binding pro- rein-1 in cervical fluid in early and mid-pregnancy are associated with an increased risk of spontaneous pre- term delivery[J]. BJOG, 2010,117(6) : 701-710.