A Study of Obstetric Factors Related to Successful Trial of Labor after Cesarean Delivery (TOLAC)

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  • MAKIUCHI Reiko
    Department of Obstetrics and Gynecology, Shinshu University School of Medicine
  • TAKATSU Akiko
    Department of Obstetrics and Gynecology, Shinshu University School of Medicine
  • ISHIKAWA Kaori
    Department of Obstetrics and Gynecology, Shinshu University School of Medicine
  • KIKUCHI Norihiko
    Department of Obstetrics and Gynecology, Shinshu University School of Medicine
  • OHIRA Satoshi
    Department of Obstetrics and Gynecology, Shinshu University School of Medicine
  • KANAI Makoto
    Department of Family and Child Nursing, and Midwifery, Shinshu University School of Medicine
  • SHIOZAWA Tanri
    Department of Obstetrics and Gynecology, Shinshu University School of Medicine

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Other Title
  • 既往帝王切開後の経腟分娩試行（TOLAC）成功に関する因子の検討
  • 既往帝王切開後の経膣分娩試行(TOLAC)成功に関する因子の検討
  • キオウ テイオウ セッカイ ゴ ノ ケイチツブンベン シコウ(TOLAC)セイコウ ニ カンスル インシ ノ ケントウ

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Objective : The purpose of this study was to clarify the obstetric factors of success in trial of labor after cesarean delivery (TOLAC).<br> Methods : A retrospective review was made of the records of 82 consecutive women who had previously undergone a cesarean section and attempted vaginal delivery at Shinshu University Hospital from 2005 through 2012. The relationship between the obstetric factors and the ‘successful’ and ‘unsuccessful’ groups in TOLAC was investigated.<br> Results : The successful rate in TOLAC was 78.0% (64/82), but 22.0% (18/82) of women were unsuccessful and required a cesarean section again. The significant predictive factors in successful vaginal delivery were history of vaginal birth before cesarean section and admission for onset of labor. The significant predictive factor in unsuccessful vaginal delivery was abnormal fetal cardiotocogram. Interestingly, cases with an interval of ≥ 36 months from previous cesarean section in the successful group were significantly more than those in the unsuccessful group.<br> Conclusion : The factors of history of vaginal birth before cesarean section, admission for onset of labor, abnormal fetal cardiotocogram and the interval from previous cesarean section might help clinicians and patients in their decision-making for the method of delivery when it comes to pregnancy with a previous cesarean section.

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