Factors independently related to a negative birth experience in first-time mothers (original) (raw)

2011, Sexual & Reproductive Healthcare

Abstract

The aim of this thesis was to study short and long term effects after caesarean section (CS) and vaginal delivery. We also studied the difficulty in estimating blood loss at delivery and birth experience estimated nine months after delivery. These studies on healthy Swedish primiparae show that improving outcome in planned vaginal deliveries by support and coping with pain are important issues, but also that risks with one planned CS are few.

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References (149)

  1. Trolle, D., The History of Caesarean Section. Reitzel Bookseller. Copenhagen, 1980.
  2. Lurie, S., The changing motives of cesarean section: from the ancient world to the twenty-first century. Arch Gynecol Obstet, 2005. 271(4): p. 281-5.
  3. Todman, D., A history of caesarean section: from ancient world to the modern era. Aust N Z J Obstet Gynaecol, 2007. 47(5): p. 357- 61.
  4. Warraich, Q. and U. Esen, Perimortem caesarean section. J Obstet Gynaecol, 2009. 29(8): p. 690-3.
  5. Pleijel, A., Drottningens chirurg. 2006, Stockholm: Nordstedts Förlag.
  6. Cederschiöld, F., Lärobok för barnmorskor. 1873.
  7. Hogberg, U., Maternal deaths related to cesarean section in Sweden, 1951-1980. Acta Obstet Gynecol Scand, 1989. 68(4): p. 351-7.
  8. Högberg, U., Barnet och badvattnet -från bekämpande av mödradöd till familje-BB och tidig hemgång. Från Jubileumsskrift "Svensk kvinnosjukvård under ett sekel" 1904-2004. 2004: p. 109- 115.
  9. Nielsen, T.F., P.O. Olausson, and I. Ingemarsson, The cesarean section rate in Sweden: the end of the rise. Birth, 1994. 21(1): p. 34-8.
  10. Socialstyrelsen. The Swedish Medical Birth Register. [cited 2009 20090506]; Available from: www.sos.se.
  11. MacDorman, M.F., F. Menacker, and E. Declercq, Cesarean birth in the United States: epidemiology, trends, and outcomes. Clin Perinatol, 2008. 35(2): p. 293-307, v.
  12. Zhang, J., et al., Cesarean delivery on maternal request in southeast China. Obstet Gynecol, 2008. 111(5): p. 1077-82.
  13. Potter, J.E., et al., Women's autonomy and scheduled cesarean sections in Brazil: a cautionary tale. Birth, 2008. 35(1): p. 33-40.
  14. Socialstyrelsen, Kejsarsnitt i Sverige. 2005.
  15. Hannah, M.E., et al., Planned caesarean section versus planned vaginal birth for breech presentation at term: a randomised multicentre trial. Term Breech Trial Collaborative Group. Lancet, 2000. 356(9239): p. 1375-83.
  16. Adler-Levy, Y., E. Lunenfeld, and A. Levy, Obstetric outcome of twin pregnancies conceived by in vitro fertilization and ovulation induction compared with those conceived spontaneously. Eur J Obstet Gynecol Reprod Biol, 2007. 133(2): p. 173-8.
  17. Pinborg, A., A. Loft, and A. Nyboe Andersen, Neonatal outcome in a Danish national cohort of 8602 children born after in vitro fertilization or intracytoplasmic sperm injection: the role of twin pregnancy. Acta Obstet Gynecol Scand, 2004. 83(11): p. 1071-8.
  18. Menacker, F., E. Declercq, and M.F. Macdorman, Cesarean delivery: background, trends, and epidemiology. Semin Perinatol, 2006. 30(5): p. 235-41.
  19. Lee, S.K., et al., Higher mortality rates among inborn infants admitted to neonatal intensive care units at night. J Pediatr, 2003. 143(5): p. 592-7.
  20. Ebulue, V., et al., Fear of failure: are we doing too many trials of instrumental delivery in theatre? Acta Obstet Gynecol Scand, 2008. 87(11): p. 1234-8.
  21. Bettes, B.A., et al., Cesarean delivery on maternal request: obstetrician-gynecologists' knowledge, perception, and practice patterns. Obstet Gynecol, 2007. 109(1): p. 57-66.
  22. Wax, J.R., et al., Patient choice cesarean--the Maine experience. Birth, 2005. 32(3): p. 203-6.
  23. Bergholt, T., et al., Danish obstetricians' personal preference and general attitude to elective cesarean section on maternal request: a nation-wide postal survey. Acta Obstet Gynecol Scand, 2004. 83(3): p. 262-6.
  24. Gunnervik, C., et al., Attitudes towards cesarean section in a nationwide sample of obstetricians and gynecologists. Acta Obstet Gynecol Scand, 2008. 87(4): p. 438-44.
  25. Florica, M., O. Stephansson, and L. Nordstrom, Indications associated with increased cesarean section rates in a Swedish hospital. Int J Gynaecol Obstet, 2006. 92(2): p. 181-5.
  26. Fuglenes, D., P. Oian, and I.S. Kristiansen, Obstetricians' choice of cesarean delivery in ambiguous cases: is it influenced by risk attitude or fear of complaints and litigation? Am J Obstet Gynecol, 2009. 200(1): p. 48 e1-8.
  27. Hickson, G.B. and S.S. Entman, Physician practice behavior and litigation risk: evidence and opportunity. Clin Obstet Gynecol, 2008. 51(4): p. 688-99.
  28. Rebelo, F., et al., High cesarean prevalence in a national population-based study in Brazil: the role of private practice. Acta Obstet Gynecol Scand. 89(7): p. 903-8.
  29. Ronsmans, C., S. Holtz, and C. Stanton, Socioeconomic differentials in caesarean rates in developing countries: a retrospective analysis. Lancet, 2006. 368(9546): p. 1516-23.
  30. Essen, B., et al., Qualitative study of pregnancy and childbirth experiences in Somalian women resident in Sweden. BJOG, 2000. 107(12): p. 1507-12.
  31. Ryding, E.L., Investigation of 33 women who demanded a cesarean section for personal reasons. Acta Obstet Gynecol Scand, 1993. 72(4): p. 280-5.
  32. Waldenstrom, U., et al., A negative birth experience: prevalence and risk factors in a national sample. Birth, 2004. 31(1): p. 17-27.
  33. Fenwick, J., J. Gamble, and Y. Hauck, Reframing birth: a consequence of cesarean section. J Adv Nurs, 2006. 56(2): p. 121- 30; discussion 131-2.
  34. Gossman, G.L., J.M. Joesch, and K. Tanfer, Trends in maternal request cesarean delivery from 1991 to 2004. Obstet Gynecol, 2006. 108(6): p. 1506-16.
  35. Lydon-Rochelle, M.T., et al., Repeat cesarean delivery: what indications are recorded in the medical chart? Birth, 2006. 33(1): p. 4-11.
  36. Pakenham, S., S.M. Chamberlain, and G.N. Smith, Women's views on elective primary caesarean section. J Obstet Gynaecol Can, 2006. 28(12): p. 1089-94.
  37. Hildingsson, I., et al., Few women wish to be delivered by caesarean section. BJOG, 2002. 109(6): p. 618-23.
  38. Robson, S., et al., Elective caesarean delivery at maternal request: a preliminary study of motivations influencing women's decision- making. Aust N Z J Obstet Gynaecol, 2008. 48(4): p. 415-20.
  39. Wax, J.R., et al., Patient choice cesarean: an evidence-based review. Obstet Gynecol Surv, 2004. 59(8): p. 601-16.
  40. Wiklund, I., G. Edman, and E. Andolf, Cesarean section on maternal request: reasons for the request, self-estimated health, expectations, experience of birth and signs of depression among first-time mothers. Acta Obstet Gynecol Scand, 2007. 86(4): p. 451-6.
  41. Pang, M.W., et al., Impact of first childbirth on changes in women's preference for mode of delivery: follow-up of a longitudinal observational study. Birth, 2008. 35(2): p. 121-8.
  42. Nielsen, T.F. and K.H. Hokegard, Postoperative cesarean section morbidity: a prospective study. Am J Obstet Gynecol, 1983. 146(8): p. 911-6.
  43. Smaill, F. and G.J. Hofmeyr, Antibiotic prophylaxis for cesarean section. Cochrane Database Syst Rev, 2002(3): p. CD000933.
  44. www.rcog.org.uk, ed. Caesarean section. 2004.
  45. NIH State-of-the-Science Conference Statement on cesarean delivery on maternal request. NIH Consens State Sci Statements, 2006. 23(1): p. 1-29.
  46. Declercq, E., et al., Maternal outcomes associated with planned primary cesarean births compared with planned vaginal births. Obstet Gynecol, 2007. 109(3): p. 669-77.
  47. Tharpe, N., Postpregnancy genital tract and wound infections. J Midwifery Womens Health, 2008. 53(3): p. 236-46.
  48. Homer, C., et al., Maternal mortality: What can we learn from stories of postpartum haemorrhage? Women Birth, 2009.
  49. Chaim, W., et al., Prevalence and clinical significance of postpartum endometritis and wound infection. Infect Dis Obstet Gynecol, 2000. 8(2): p. 77-82.
  50. Ford, J.B., et al., Postpartum haemorrhage occurrence and recurrence: a population-based study. Med J Aust, 2007. 187(7): p. 391-3.
  51. Rossen, J., et al., Is there an increase of postpartum hemorrhage, and is severe hemorrhage associated with more frequent use of obstetric interventions? Acta Obstet Gynecol Scand. 89(10): p. 1248-55.
  52. Brant, H.A., Precise estimation of postpartum haemorrhage: difficulties and importance. Br Med J, 1967. 1(5537): p. 398-400.
  53. Duthie, S.J., et al., Intra-operative blood loss during elective lower segment caesarean section. Br J Obstet Gynaecol, 1992. 99(5): p. 364-7.
  54. Duthie, S.J., et al., Discrepancy between laboratory determination and visual estimation of blood loss during normal delivery. Eur J Obstet Gynecol Reprod Biol, 1991. 38(2): p. 119-24.
  55. Glover, P., Blood loss at delivery: how accurate is your estimation? Aust J Midwifery, 2003. 16(2): p. 21-4.
  56. Quinlivan, W.L. and J.A. Brock, Blood volume changes and blood loss associated with labor. I. Correlation of changes in blood volume measured by I-131 albumin and Evans blue dye, with measured blood loss. Am J Obstet Gynecol, 1970. 106(6): p. 843- 9.
  57. Razvi, K., et al., A comparison between visual estimation and laboratory determination of blood loss during the third stage of labour. Aust N Z J Obstet Gynaecol, 1996. 36(2): p. 152-4.
  58. Wilcox, C., A. Hunt, and C. Owen, The measurement of blood lost during cesarean section. Am J Obstet Gynecol, 1959. 77: p. 772-9.
  59. Lindqvist, P., B. Dahlback, and K. Marsal, Thrombotic risk during pregnancy: a population study. Obstet Gynecol, 1999. 94(4): p. 595-9.
  60. Walker, I.D., Venous and arterial thrombosis during pregnancy: epidemiology. Semin Vasc Med, 2003. 3(1): p. 25-32.
  61. Liu, S., et al., Maternal mortality and severe morbidity associated with low-risk planned cesarean delivery versus planned vaginal delivery at term. CMAJ, 2007. 176(4): p. 455-60.
  62. Jacobsen, A.F., F.E. Skjeldestad, and P.M. Sandset, Ante-and postnatal risk factors of venous thrombosis: a hospital-based case- control study. J Thromb Haemost, 2008. 6(6): p. 905-12.
  63. Lindqvist, P.G., et al., Postpartum thromboembolism: severe events might be preventable using a new risk score model. Vasc Health Risk Manag, 2008. 4(5): p. 1081-7.
  64. Larsen, T.B., et al., Maternal smoking, obesity, and risk of venous thromboembolism during pregnancy and the puerperium: a population-based nested case-control study. Thromb Res, 2007. 120(4): p. 505-9.
  65. Hemminki, E., Impact of caesarean section on future pregnancy--a review of cohort studies. Paediatr Perinat Epidemiol, 1996. 10(4): p. 366-79.
  66. Hemminki, E. and J. Merilainen, Long-term effects of cesarean sections: ectopic pregnancies and placental problems. Am J Obstet Gynecol, 1996. 174(5): p. 1569-74.
  67. National Collaborating Centre for Womens and Childrens Health. Royal College of Obstetrics and Gynecology, R., Cesarean section. Clinical Guideline. 2004.
  68. Bhattacharya, S., et al., Absence of conception after caesarean section: voluntary or involuntary? BJOG, 2006. 113(3): p. 268-75.
  69. Getahun, D., et al., Previous cesarean delivery and risks of placenta previa and placental abruption. Obstet Gynecol, 2006. 107(4): p. 771-8.
  70. Lydon-Rochelle, M., et al., Risk of uterine rupture during labor among women with a prior cesarean delivery. N Engl J Med, 2001. 345(1): p. 3-8.
  71. Taylor, D.R., et al., Uterine rupture with the use of PGE2 vaginal inserts for labor induction in women with previous cesarean sections. J Reprod Med, 2002. 47(7): p. 549-54.
  72. Ofir, K., et al., Uterine rupture: risk factors and pregnancy outcome. Am J Obstet Gynecol, 2003. 189(4): p. 1042-6.
  73. Nisenblat, V., et al., Maternal complications associated with multiple cesarean deliveries. Obstet Gynecol, 2006. 108(1): p. 21- 6.
  74. Latthe, P., et al., Factors predisposing women to chronic pelvic pain: systematic review. BMJ, 2006. 332(7544): p. 749-55.
  75. Andolf, E., M. Thorsell, and K. Kallen, Cesarean delivery and risk for postoperative adhesions and intestinal obstruction: a nested case-control study of the Swedish Medical Birth Registry. Am J Obstet Gynecol. 203(4): p. 406 e1-6.
  76. MacLennan, A.H., et al., The prevalence of pelvic floor disorders and their relationship to gender, age, parity and mode of delivery. BJOG, 2000. 107(12): p. 1460-70.
  77. Samuelsson, E.C., et al., Signs of genital prolapse in a Swedish population of women 20 to 59 years of age and possible related factors. Am J Obstet Gynecol, 1999. 180(2 Pt 1): p. 299-305.
  78. Buchsbaum, G.M., et al., Pelvic organ prolapse in nulliparous women and their parous sisters. Obstet Gynecol, 2006. 108(6): p. 1388-93.
  79. Rortveit, G., et al., Vaginal delivery parameters and urinary incontinence: the Norwegian EPINCONT study. Am J Obstet Gynecol, 2003. 189(5): p. 1268-74.
  80. Hannah, M.E., et al., Outcomes at 3 months after planned cesarean vs planned vaginal delivery for breech presentation at term: the international randomized Term Breech Trial. JAMA, 2002. 287(14): p. 1822-31.
  81. Ekstrom, A., et al., Planned cesarean section versus planned vaginal delivery: comparison of lower urinary tract symptoms. Int Urogynecol J Pelvic Floor Dysfunct, 2008. 19(4): p. 459-65.
  82. Hannah, M.E., et al., Maternal outcomes at 2 years after planned cesarean section versus planned vaginal birth for breech presentation at term: the international randomized Term Breech Trial. Am J Obstet Gynecol, 2004. 191(3): p. 917-27.
  83. Buchsbaum, G.M., et al., Prevalence of urinary incontinence and associated risk factors in a cohort of nuns. Obstet Gynecol, 2002. 100(2): p. 226-9.
  84. Nelson, R.L., et al., Cesarean delivery for the prevention of anal incontinence. Cochrane Database Syst Rev. 2: p. CD006756.
  85. Carley, M.E., et al., Obstetric history in women with surgically corrected adult urinary incontinence or pelvic organ prolapse. J Am Assoc Gynecol Laparosc, 1999. 6(1): p. 85-9.
  86. Chiaffarino, F., et al., Reproductive factors, family history, occupation and risk of urogenital prolapse. Eur J Obstet Gynecol Reprod Biol, 1999. 82(1): p. 63-7.
  87. Lukacz, E.S., et al., Parity, mode of delivery, and pelvic floor disorders. Obstet Gynecol, 2006. 107(6): p. 1253-60.
  88. Moalli, P.A., et al., Risk factors associated with pelvic floor disorders in women undergoing surgical repair. Obstet Gynecol, 2003. 101(5 Pt 1): p. 869-74.
  89. Tegerstedt, G., et al., Obstetric risk factors for symptomatic prolapse: a population-based approach. Am J Obstet Gynecol, 2006. 194(1): p. 75-81.
  90. Uma, R., G. Libby, and D.J. Murphy, Obstetric management of a woman's first delivery and the implications for pelvic floor surgery in later life. BJOG, 2005. 112(8): p. 1043-6.
  91. Gurel, H. and S.A. Gurel, Pelvic relaxation and associated risk factors: the results of logistic regression analysis. Acta Obstet Gynecol Scand, 1999. 78(4): p. 290-3.
  92. Krebs, L. and J. Langhoff-Roos, Elective cesarean delivery for term breech. Obstet Gynecol, 2003. 101(4): p. 690-6.
  93. Schytt, E. and U. Waldenstrom, Risk factors for poor self-rated health in women at 2 months and 1 year after childbirth. J Womens Health (Larchmt), 2007. 16(3): p. 390-405.
  94. Goodman, P., M.C. Mackey, and A.S. Tavakoli, Factors related to childbirth satisfaction. J Adv Nurs, 2004. 46(2): p. 212-9.
  95. Schindl, M., et al., Elective cesarean section vs. spontaneous delivery: a comparative study of birth experience. Acta Obstet Gynecol Scand, 2003. 82(9): p. 834-40.
  96. Gottvall, K. and U. Waldenstrom, Does a traumatic birth experience have an impact on future reproduction? BJOG, 2002. 109(3): p. 254-60.
  97. Wijma, K., B. Wijma, and M. Zar, Psychometric aspects of the W- DEQ; a new questionnaire for the measurement of fear of childbirth. J Psychosom Obstet Gynaecol, 1998. 19(2): p. 84-97.
  98. Lavender, T., S.A. Walkinshaw, and I. Walton, A prospective study of women's views of factors contributing to a positive birth experience. Midwifery, 1999. 15(1): p. 40-6.
  99. Alehagen, S., B. Wijma, and K. Wijma, Fear of childbirth before, during, and after childbirth. Acta Obstet Gynecol Scand, 2006. 85(1): p. 56-62.
  100. Waldenstrom, U., A. Rudman, and I. Hildingsson, Intrapartum and postpartum care in Sweden: women's opinions and risk factors for not being satisfied. Acta Obstet Gynecol Scand, 2006. 85(5): p. 551-60.
  101. Hodnett, E.D., et al., Continuous support for women during childbirth. Cochrane Database Syst Rev, 2007(3): p. CD003766.
  102. Newton, J., G. Barnard, and W. Collins, A rapid method for measuring menstrual blood loss using automatic extraction. Contraception, 1977. 16: p. 269-80.
  103. Rubertsson, C., et al., Depressive symptoms in early pregnancy, two months and one year postpartum-prevalence and psychosocial risk factors in a national Swedish sample. Arch Womens Ment Health, 2005. 8(2): p. 97-104.
  104. Ryding, E.L., K. Wijma, and B. Wijma, Psychological impact of emergency cesarean section in comparison with elective cesarean section, instrumental and normal vaginal delivery. J Psychosom Obstet Gynaecol, 1998. 19(3): p. 135-44.
  105. Wickberg, B. and C.P. Hwang, The Edinburgh Postnatal Depression Scale: validation on a Swedish community sample. Acta Psychiatr Scand, 1996. 94(3): p. 181-4.
  106. Gustavsson, J., et al., Stability and predictive ability of personality traits across 9 years. Personality and individual differences, 1997. 22(6): p. 783-791.
  107. Schalling, D., et al., Markers for vulnerability to psychopathology: temperament traits associated with platelet MAO activity. Acta Psychiatr Scand, 1987. 76(2): p. 172-82.
  108. Kampe, T., G. Edman, and H. Hannerz, Ten-year follow-up study of personality traits in adults with intact and restored dentitions. J Oral Rehabil, 1996. 23(7): p. 443-9.
  109. Bland, J.M. and D.G. Altman, Statistical methods for assessing agreement between two methods of clinical measurement. Lancet, 1986. 1(8476): p. 307-10.
  110. Pajkrt, E., et al., Intra-and interoperator repeatability of the nuchal translucency measurement. Ultrasound Obstet Gynecol, 2000. 15(4): p. 297-301.
  111. Mantel, N. and W. Haenzsel, Statistical aspects of the analyses of data from retrospective studies of disease. J Nat Cancer Inst, 1959. 22: p. 19-48.
  112. Miettinen, O., Simple interval estimation of risk ratio. Am J Epidemiol, 1974. 100: p. 515-6.
  113. Robson, M.S., Can we reduce the caesarean section rate? Best Pract Res Clin Obstet Gynaecol, 2001. 15(1): p. 179-94.
  114. Chaillet, N. and A. Dumont, Evidence-based strategies for reducing cesarean section rates: a meta-analysis. Birth, 2007. 34(1): p. 53-64.
  115. Lee, Y.M. and M.E. D'Alton, Cesarean delivery on maternal request: maternal and neonatal complications. Curr Opin Obstet Gynecol, 2008. 20(6): p. 597-601.
  116. Visco, A.G., et al., Cesarean delivery on maternal request: maternal and neonatal outcomes. Obstet Gynecol, 2006. 108(6): p. 1517-29.
  117. Toledo, P., et al., The accuracy of blood loss estimation after simulated vaginal delivery. Anesth Analg, 2007. 105(6): p. 1736- 40, table of contents.
  118. Villar, J., et al., Maternal and neonatal individual risks and benefits associated with caesarean delivery: multicentre prospective study. BMJ, 2007. 335(7628): p. 1025.
  119. Liu, S., et al., Risk of maternal postpartum readmission associated with mode of delivery. Obstet Gynecol, 2005. 105(4): p. 836-42.
  120. Dahlgren, L.S., et al., Caesarean section on maternal request: risks and benefits in healthy nulliparous women and their infants. J Obstet Gynaecol Can, 2009. 31(9): p. 808-17.
  121. Angioli, R., et al., Severe perineal lacerations during vaginal delivery: the University of Miami experience. Am J Obstet Gynecol, 2000. 182(5): p. 1083-5.
  122. Dahl, C. and P. Kjolhede, Obstetric anal sphincter rupture in older primiparous women: a case-control study. Acta Obstet Gynecol Scand, 2006. 85(10): p. 1252-8.
  123. Hornemann, A., et al., Advanced age is a risk factor for higher grade perineal lacerations during delivery in nulliparous women. Arch Gynecol Obstet, 2009.
  124. Burrows, L.J., L.A. Meyn, and A.M. Weber, Maternal morbidity associated with vaginal versus cesarean delivery. Obstet Gynecol, 2004. 103(5 Pt 1): p. 907-12.
  125. Dudding, T.C., C.J. Vaizey, and M.A. Kamm, Obstetric anal sphincter injury: incidence, risk factors, and management. Ann Surg, 2008. 247(2): p. 224-37.
  126. Sobande, A. and M. Eskandar, Multiple repeat caesarean sections: complications and outcomes. J Obstet Gynaecol Can, 2006. 28(3): p. 193-7.
  127. Mant, J., R. Painter, and M. Vessey, Epidemiology of genital prolapse: observations from the Oxford Family Planning Association Study. Br J Obstet Gynaecol, 1997. 104(5): p. 579-85.
  128. Rinne, K.M. and P.P. Kirkinen, What predisposes young women to genital prolapse? Eur J Obstet Gynecol Reprod Biol, 1999. 84(1): p. 23-5.
  129. Soderberg, M.W., et al., Young women with genital prolapse have a low collagen concentration. Acta Obstet Gynecol Scand, 2004. 83(12): p. 1193-8.
  130. Figueiredo, B., et al., Mother-to-infant emotional involvement at birth. Matern Child Health J, 2009. 13(4): p. 539-49.
  131. Taylor, A., et al., A new Mother-to-Infant Bonding Scale: links with early maternal mood. Arch Womens Ment Health, 2005. 8(1): p. 45-51.
  132. Ryding, E.L., et al., Personality and fear of childbirth. Acta Obstet Gynecol Scand, 2007. 86(7): p. 814-20.
  133. Rijnders, M., et al., Perinatal factors related to negative or positive recall of birth experience in women 3 years postpartum in the Netherlands. Birth, 2008. 35(2): p. 107-16.
  134. Waldenstrom, U. and E. Schytt, A longitudinal study of women's memory of labour pain--from 2 months to 5 years after the birth. BJOG, 2009. 116(4): p. 577-83.
  135. Rouhe, H., et al., Fear of childbirth according to parity, gestational age, and obstetric history. BJOG, 2009. 116(1): p. 67- 73.
  136. Bragg, F., et al., Variation in rates of caesarean section among English NHS trusts after accounting for maternal and clinical risk: cross sectional study. BMJ. 341: p. c5065.
  137. Eriksson, S.L., P.O. Olausson, and C. Olofsson, Use of epidural analgesia and its relation to caesarean and instrumental deliveries-a population--based study of 94,217 primiparae. Eur J Obstet Gynecol Reprod Biol, 2006. 128(1-2): p. 270-5.
  138. Lowder, J.L., et al., Risk factors for primary and subsequent anal sphincter lacerations: a comparison of cohorts by parity and prior mode of delivery. Am J Obstet Gynecol, 2007. 196(4): p. 344 e1-5.
  139. Prager, M., et al., The incidence of obstetric anal sphincter rupture in primiparous women: a comparison between two European delivery settings. Acta Obstet Gynecol Scand, 2008. 87(2): p. 209- 15.
  140. Sultan, A.H., et al., Anal-sphincter disruption during vaginal delivery. N Engl J Med, 1993. 329(26): p. 1905-11.
  141. Waterstone, M., et al., Postnatal morbidity after childbirth and severe obstetric morbidity. BJOG, 2003. 110(2): p. 128-33.
  142. Pascali-Bonaro, D. and M. Kroeger, Continuous female companionship during childbirth: a crucial resource in times of stress or calm. J Midwifery Womens Health, 2004. 49(4 Suppl 1): p. 19-27.
  143. Sauls, D.J., Effects of labor support on mothers, babies, and birth outcomes. J Obstet Gynecol Neonatal Nurs, 2002. 31(6): p. 733- 41.
  144. Waldenstrom, U., I. Hildingsson, and E.L. Ryding, Antenatal fear of childbirth and its association with subsequent caesarean section and experience of childbirth. BJOG, 2006. 113(6): p. 638-46.
  145. Johnson, R. and P. Slade, Does fear of childbirth during pregnancy predict emergency caesarean section? BJOG, 2002. 109(11): p. 1213-21.
  146. Gamble, J. and D.K. Creedy, A counselling model for postpartum women after distressing birth experiences. Midwifery, 2009. 25(2): p. e21-30.
  147. Tschudin, S., et al., Pregnant women's perception of cesarean section on demand. J Perinat Med, 2009.
  148. ACOG Committee Opinion No. 394, December 2007. Cesarean delivery on maternal request. Obstet Gynecol, 2007. 110(6): p. 1501.
  149. Bergeron, V., The ethics of cesarean section on maternal request: a feminist critique of the American College of Obstetricians and Gynecologists' position on patient-choice surgery. Bioethics, 2007. 21(9): p. 478-87.