REFERENCES
- Spellacy WN, Gravem H, Fisch RO. The umbilical cord complications of true knots, nuchal coils, and cords around the body. Am J Obstet Gynec 94:1136–1142, 1966.
- Matorras R, Diez J, Pereira JG, et al. True knots in the umbilical cord: clinical findings and fetal consequences. J Obstet gynaecol 10:383–386, 1990.
- Clerici G, Koutras I, Luzietti R, DiRenzo GC. Multiple true umbilical knots: a silent risk for intrauterine growth restrictions with anomalous hemodynamic pattern. Fetal Diagn Ther 22:440–443, 2007.
- Hershkovitz R, Silberstein T, Sheiner E, Risk factors associated with true knots of the umbilical cord. European J Ob Gyn Rep Biol 98:36–39, 2001.
- Lopez C, Cajal RY, Martinez RO. Prenatal diagnosis of true knot of the umbilical cord. Ultrasound Obstet Gynecol 23:99–100, 2004.
- Sepulveda W, Shennan AH, Bower S, True knot of the umbilical cord: a difficult prenatal ultrasonographic diagnosis. Ultrasound Obstet Gynecol 5:106–108, 1995.
- Gembruch U, Baschat AA. True knot of the umbilical cord: transient constructive effect to umbilical vein blood flow demonstrated by doppler sonography. Ultrasound Obstet Gynecol 8: 53–56, 1996.
- Collins JC, Muller RJ, Collins CL. Prenatal observation of umbilical cord abnormalities: a triple knot and torsion of the umbilical cord. Am J Obstet Gynecol 169:102–104, 1993.
- Sherer DM, Dalloul M, Zigalo A, Power doppler and 3–dimensional sonographic diagnosis of multiple separate true knots of the umbilical cord. J Ultrasound Med 24:1321–1323, 2005.
- Maher JT, Conti JA. A comparison of umbilical cord blood gas value between newborns with and without true knots. Obstet Gynecol 88: 863–866, 1996.
- Sornes T. Umbilical cord knots. Acta Ob Gyn Scand 79: 157–159, 2000.
- Spellacy WN, McCarthy JM, Tsibris JCM Fetal umbilical cord blood erythropoietin, interleukin-6, pH, pO2, PCO2 and base excess levels in histologic and/or clinic chorioamnionitis: is the response only inflammatory. Fetal Pediatr Pathol 28: 239–246, 2009.
- McCarthy JM, Capullari T, Thompson Z, Umbilical cord nucleated red blood cell counts: normal values and the effect of labor. J Perinat 26:89–92, 2006.