[1. Alexander JM, Sharma SK, McIntire DD, Leveno KJ. Epidural analgesia lengthens the Friedman active phase of labor // Obstetrics & Gynecology, 2002; 100(1):46-50]Search in Google Scholar
[2. Ali UA, Norwitz ER (2009). Vacuum-assisted vaginal delivery // Reviews in Obstetrics and Gynecology, 2009; 2:5]Search in Google Scholar
[3. Anim-Somuah M, Smyth RM, Jones, L. Epidural versus non-epidural or no analgesia in labour // Cochrane Database Syst Rev, 2011; 1210.1002/14651858.CD000331.pub322161362]Search in Google Scholar
[4. Bodner-Adler B, Bodner K, Kimberger O, Wagenbichler P, Kaider A, Husslein P, Mayerhofer K. The effect of epidural analgesia on the occurrence of obstetric lacerations and on the neonatal outcome during spontaneous vaginal delivery // Archives of gynecology and obstetrics, 2002; 267:81-84]Search in Google Scholar
[5. Carroll TG, Engelken M, Mosier MC, Nazir N. Epidural analgesia and severe perineal laceration in a community-based obstetric practice // The Journal of the American Board of Family Practice, 2003; 16: 1-6]Search in Google Scholar
[6. Costley PL, East CE. Oxytocin augmentation of labour in women with epidural analgesia for reducing operative deliveries // Cochrane Database Syst Rev, 2013; 710.1002/14651858.CD009241.pub3713353923846738]Search in Google Scholar
[7. Eriksson SL, Olausson PO, Olofsson C. Use of epidural analgesia and its relation to caesarean and instrumental deliveries - a population-based study of 94217 primiparae // Eur J Obstet Gynecol Reprod Biol, 2006; 128:270-275]Search in Google Scholar
[8. Fitzpatrick M, McQuillan K, O’Herlihy C. Influence of persistent occiput posterior position on delivery outcome // Obstetrics & Gynecology, 2011; 98(6):1027-1031]Search in Google Scholar
[9. Gardberg M, Laakkonen E, Salevaara M. Intrapartum sonography and persistent occiput posterior position: A study of 408 deliveries // Obstet Gynecol 1998;91:746-9]Search in Google Scholar
[10. Ginosar Y, Weiniger CF, Kurz V, Babchenko A, Nitzan M, Davidson E. (2009). Sympathectomy-mediated vasodilatation: a randomized concentration ranging study of epidural bupivacaine // Canadian Journal of Anesthesia/Journal canadien d’anesthésie, 2009; 56:213-221]Search in Google Scholar
[11. Halpern SH, Abdallah FW. Effect of labor analgesia on labor outcome // Current Opinion in Anesthesiology, 2010; 23(3):317-322]Search in Google Scholar
[12. Hasegawa J, Farina A, Turchi G, Hasegawa Y, Zanello M, Baroncini S. Effects of epidural analgesia on labor length, instrumental delivery, and neonatal short-term outcome // J Anesth, 2013; 27:43-47]Search in Google Scholar
[13. Ingemarsson E, Solum, T, Westgren, M. Influence of occiput posterior position on the fetal heart rate pattern // Obstetrics and gynecology, 1980; 55(3):301-304]Search in Google Scholar
[14. Kemp E, Kingswood CJ, Kibuka M, Thornton JG. Position in the second stage of labour for women with epidural anaesthesia // The Cochrane Library, 201310.1002/14651858.CD008070.pub223440824]Search in Google Scholar
[15. Laughon SK, Berghella V, Reddy UM, Sundaram R, Lu Z, Hoffman MK. (2014). Neonatal and maternal outcomes with prolonged second stage of labor // Obstetrics & Gynecology, 2014; 124(1): 57-67]Search in Google Scholar
[16. Leong EW, Sivanesaratnam V, Oh LL, Chan YK. (2000). Epidural analgesia in primigravidae in spontaneous labour at term: a prospective study // Journal of Obstetrics and Gynaecology Research, 2000; 26(4):271-275.]Search in Google Scholar
[17. Lieberman E, Davidson K, Lee-Parritz A, Shearer E. Changes in fetal position during labor and their association with epidural analgesia // Obstetrics and Gynecology, 2005; 105: 974-982]Search in Google Scholar
[18. O’Hana HP, Levy A, Rozen A, Greemberg L, Shapira Y, Sheiner E. The effect of epidural analgesia on labor progress and outcome in nulliparous women // The Journal of Maternal-Fetal & Neonatal Medicine, 2008; 21(8):517-521]Search in Google Scholar
[19. Pergialiotis V, Vlachos D, Protopapas A, Pappa K, Vlachos G. Risk factors for severe perineal lacerations during childbirth // International Journal of Gynecology & Obstetrics, 2014; 125(1):6-14]Search in Google Scholar
[20. Ponkey SE, Cohen AP, Heffner LJ, Lieberman E. Persistent fetal occiput posterior position: obstetric outcomes // Obstetrics & Gynecology, 2003; 101(5, Part 1):915-92010.1097/00006250-200305000-00016]Search in Google Scholar
[21. Reynolds F. The effects of maternal labour analgesia on the fetus // Best Practice & Research Clinical Obstetrics & Gynaecology, 2010; 24(3):289-302]Search in Google Scholar
[22. Reynolds F, Sharma SK, Seed PT. Analgesia in labour and fetal acid-base balance: a meta‐analysis comparing epidural with systemic opioid analgesia // BJOG: an international journal of obstetrics & gynaecology, 2002; 109(12):1344-1353]Search in Google Scholar
[23. Rimaitis K, Klimenko O, Rimaitis M, Morkūnaitė A, Macas A. Labor epidural analgesia and the incidence of instrumental assisted delivery // Medicina, 2015; 51: 76-80]Search in Google Scholar
[24. Roberts CL, Algert CS, Cameron CA, Torvaldsen S. A meta‐analysis of upright positions in the second stage to reduce instrumental deliveries in women with epidural analgesia // Acta obstetricia et gynecologica Scandinavica, 2005; 84(8):794-798]Search in Google Scholar
[25. Robinson JN, Norwitz ER, Cohen AP, McElrath TF, Lieberman ES. Epidural analgesia and third-or fourth-degree lacerations in nulliparas // Obstetrics & Gynecology, 1999; 94: 259-262]Search in Google Scholar
[26. Ros A, Felberbaum R, Jahnke I, Diedrich K, Schmucker P, Huppe M. Epidural anaesthesia for labour: does it influence the mode of delivery? // Arch Gynecol Obstet, 2007; 275: 269-274]Search in Google Scholar
[27. Sng BL, Leong WL, Zeng Y, Siddiqui FJ, Assam PN, Lim Y, Chan E, Sia AT. Early versus late initiation of epidural analgesia for labour // The Cochrane Library, 201410.1002/14651858.CD007238.pub225300169]Search in Google Scholar
[28. Torvaldsen S, Roberts CL, Bell JC Raynes‐Greenow CH. Discontinuation of epidural analgesia late in labour for reducing the adverse delivery outcomes associated with epidural analgesia // The Cochrane Library, 200410.1002/14651858.CD004457.pub2882675915495111]Search in Google Scholar
[29. World Health Organization. Reproductive Health. Pregnancy, childbirth, postpartum, and newborn care: a guide for essential practice // World Health Organization, 2003: 62]Search in Google Scholar
[30. Zhang J, Yancey MK, Klebanoff MA, Schwarz J, Schweitzer D. Does epidural analgesia prolong labor and increase risk of cesarean delivery? A natural experiment. // American journal of obstetrics and gynecology, 2001; 185: 128-13410.1067/mob.2001.11387411483916]Search in Google Scholar