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ORIGINAL ARTICLE
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Vaginal birth after cesarean score for the prediction of successful vaginal birth after cesarean section – A prospective observational study


1 Department of Obstetrics and Gynaecology, All India Institute of Medical Sciences, New Delhi, India
2 Department of Obstetrics and Gynaecology, Hamdard Institute of Medical Sciences and Research, New Delhi, India
3 Department of Preventive and Social Medicine, Hamdard Institute of Medical Sciences and Research, New Delhi, India

Correspondence Address:
Aruna Nigam,
Department of Obstetrics and Gynaecology, Hamdard Institute of Medical Sciences and Research, Jamia Hamdard, New Delhi
India
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/injms.injms_77_22

Aim: The aim of this study was to evaluate the demographic and obstetrical factors affecting the chances of vaginal birth after cesarean (VBAC) delivery and to develop a scoring system for the prediction of same. Materials and Methods: It was a prospective observational study done over a period of 1 year. A total of 100 term pregnant women with previous one lower-segment cesarean section (LSCS) fulfilling the criteria for a trial of labor were recruited for the study. As 23 patients refused to undergo trial of labor after cesarean (TOLAC) in early labor, 77 women formed the study group. Parameters assessed to predict successful TOLAC were maternal age, body mass index (BMI), history of prior vaginal delivery, interdelivery interval, indication of previous cesarean section, gestational age, type of labor, Bishop's score, and expected baby weight. Scores 0–2 were given, and the mean score obtained was correlated with the outcome of TOLAC. Results: Successful vaginal delivery occurred in 57.14% (44/77) of women. BMI ≤30 kg/m2 (P = 0.004), parity ≤ 3 (P = 0.005), Bishop's score >4 (P = 0.000), spontaneous onset of labor at the time of admission (P = 0.001), and nonrecurrent indication of previous LSCS (P = 0.029) were found to be significantly associated with the VBAC. The probability of having a successful VBAC was 83.3% and 100%, with the VBAC score value of more than 18 and 20, respectively. Conclusion: The mean VBAC score of 18–20 by the current scoring system is beneficial in predicting the outcome. This can help in counseling the patient, relatives as well as health professionals to undergo labor trial to decrease the cesarean section rate in the current era.


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