Low-risk pregnancy at 41 weeks: when should we induce labor?

References

• International Statistical Classification of Diseases and Related Health Problems, 10th revision. Geneva (CH): World Health Organization; 2006.
   Google Scholar
• Usher RH, Boyd ME, McLean FH, Kramer MS. Assessment of fetal risk in postdate pregnancies. Am J Obstet Gynecol 1988;158:259–264.
   PubMed Web of Science ®Google Scholar
• Treger M, Hallak M, Silberstein T, Friger M, Katz M, Mazor M. Post-term pregnancy: should induction of labor be considered before 42 weeks? J Matern Fetal Neonatal Med 2002;11:50–53.
   PubMedGoogle Scholar
• Olesen AW, Westergaard JG, Olsen J. Perinatal and maternal complications related to postterm delivery: a national register-based study, 1978-1993. Am J Obstet Gynecol 2003;189:222–227.
   PubMed Web of Science ®Google Scholar
• Cheng YW, Nicholson JM, Nakagawa S, Bruckner TA, Washington AE, Caughey AB. Perinatal outcomes in low-risk term pregnancies: do they differ by week of gestation? Am J Obstet Gynecol 2008;199:370.e1–370.e7.
   Web of Science ®Google Scholar
• Divon MY, Haglund B, Nisell H, Otterblad PO, Westgren M. Fetal and neonatal mortality in the postterm pregnancy: the impact of gestational age and fetal growth restriction. Am J Obstet Gynecol 1998;178:726–731.
   PubMed Web of Science ®Google Scholar
• Caughey AB, Stotland NE, Washington AE, Escobar GJ. Maternal and obstetric complications of pregnancy are associated with increasing gestational age at term. Am J Obstet Gynecol 2007;196:155.e1–155.e6.
   PubMedGoogle Scholar
• Hannah ME. Postterm pregnancy: should all women have labour induced? A review of the literature. Fetal Maternal and Neonatal Medicine Review. 1993;5:3–17.
   Google Scholar
• Gülmezoglu AM, Crowther CA, Middleton P. Inducción del trabajo de parto para mejorar los resultados en mujeres a término o después del término (Revisión Cochrane traducida). The Cochrane Library, 2008 Issue 3. Chischester, UK: John Wiley & Sons Ltd.
   Google Scholar
• Hannah ME, Hannah WJ, Hellmann J, Hewson S, Milner R, Willan A. Induction of labor as compared with serial antenatal monitoring in post-term pregnancy. A randomized controlled trial. The Canadian Multicenter Post-term Pregnancy Trial Group. N Engl J Med 1992;326:1587–1592.
   PubMed Web of Science ®Google Scholar
• Sanchez-Ramos L, Olivier F, Delke I, Kaunitz AM. Labor induction versus expectant management for postterm pregnancies: a systematic review with meta-analysis. Obstet Gynecol 2003;101:1312–1318.
   PubMed Web of Science ®Google Scholar
• Society of Obstetricians,and Gynaecologists of Canada. Guidelines for the Management of Pregnancy at 41 + 0 to 42 + 0 weeks. J Obstet Gynaecol Can 2008;30:800–810.
   PubMedGoogle Scholar
• National Institute for Health and Clinical Excellence. Induction of labour.2008. Disponible en: www.nice.org.uk/CGD.
   Google Scholar
• Robinson HP, Fleming JE. A critical evaluation of sonar “crown-rump length” measurements. Br J Obstet Gynaecol 1975;82:702–710.
   PubMedGoogle Scholar
• Report of the National high blood pressure education program working group on high blood pressure in pregnancy. Am J Obstet Gynecol, 2000.183:S1–S22
   PubMed Web of Science ®Google Scholar
• Keegan KA Jr. The nonstress test. Clin Obstet Gynecol 1987;30:921–935.
   PubMedGoogle Scholar
• Phelan JP, Smith CV, Broussard P, Small M. Amniotic fluid volume assessment with the four-quadrant technique at 36-42 weeks’ gestation. J Reprod Med 1987;32:540–542.
   PubMed Web of Science ®Google Scholar
• Gardosi J, Francis A. Controlled trial of fundal height measurement plotted on customised antenatal growth charts. Br J Obstet Gynaecol 1999;106:309–317.
   PubMedGoogle Scholar
• Estructura de la Clasificación Internacional Uniforme de Ocupaciones, 2008 (CIUO-08).
   Google Scholar
• Figueras F, Meler E, Iraola A, Eixarch E, Coll O, Figueras J, Francis A, et al. Customized birthweight standards for a Spanish population. Eur J Obstet Gynecol Reprod Biol 2008;136:20–24.
   PubMed Web of Science ®Google Scholar
• Mandruzzato G, Alfirevic Z, Chervenak F, Gruenebaum A, Heimstad R, Heinonen S, Levene M, et al.; World Association of Perinatal Medicine. Guidelines for the management of postterm pregnancy. J Perinat Med 2010;38:111–119.
   PubMed Web of Science ®Google Scholar
• Clausson B, Cnattingius S, Axelsson O. Outcomes of post-term births: the role of fetal growth restriction and malformations. Obstet Gynecol 1999;94:758–762.
   PubMed Web of Science ®Google Scholar
• McLean FH, Boyd ME, Usher RH, Kramer MS. Postterm infants: too big or too small? Am J Obstet Gynecol 1991;164:619–624.
   PubMed Web of Science ®Google Scholar
• Caughey AB, Stotland NE, Washington AE, Escobar GJ. Who is at risk for prolonged and postterm pregnancy? Am J Obstet Gynecol 2009;200:683.e1–683.e5.
   PubMed Web of Science ®Google Scholar
• Kramer MS, McLean FH, Boyd ME, Usher RH. The validity of gestational age estimation by menstrual dating in term, preterm, and postterm gestations. JAMA 1988;260:3306–3308.
   PubMed Web of Science ®Google Scholar
• Caughey AB, Stotland NE, Washington AE, Escobar GJ. Who is at risk for prolonged and postterm pregnancy? Am J Obstet Gynecol 2009;200:683.e1–683.e5.
   PubMed Web of Science ®Google Scholar
• Sladkevicius P, Saltvedt S, Almström H, Kublickas M, Grunewald C, Valentin L. Ultrasound dating at 12-14 weeks of gestation. A prospective cross-validation of established dating formulae in in-vitro fertilized pregnancies. Ultrasound Obstet Gynecol 2005;26:504–511.
   PubMed Web of Science ®Google Scholar