1. Gupta S, Faridi MMA, Krishnan J (2006) Umbilical coiling index. J Obstet Gynecol India 56:315–319
2. Cunningham FG, Leveno KJ, Bloom SL, Haute JC, Rouse DJ, Spong CY (2010) The newborn infant. In: Cunningham FG, Leveno KJ, Bloom SL, Haute JC, Rouse DJ, Spong CY (eds) Williams Obstetrics, 23rd edn. McGraw Hill, USA, pp 595–598
3. Onderoglu LS, Dursun P, Durukan T (2008) Perinatal features and umbilical cord blood gases in newborns complicated with nuchal cord. Turkish J Pediatr 50:466–470
4. Duffy S, Cochrane R (2007) A difficult delivery associated with a nuchal cord found nine times around the fetal neck. J Obstet Gynaecol 27:859–860
5. Peregrine E, O’Brien P, Jauniaux E (2005) Ultrasound detection of nuchal cord prior to labor induction and the risk of Cesarean section. Ultrasound Obstet Gynecol 25:160–164