Trial Of Labor & Vbac
Explore key aspects of Trial of Labor and Vaginal Birth After Cesarean (VBAC) through this focused quiz. Assess your understanding of VBAC success rates, benefits over cesarean delivery, major risks like uterine rupture, and factors influencing VBAC outcomes.
- 1.
What is the overall rate of achieving VBAC (Vaginal delivery after cesarean) in TOLAC (trial of labor after cesarean)
- A.
60% - 80%
- B.
40% - 60%
- C.
87%
- D.
91%
Correct Answer
A. 60% - 80%Explanation
The overall probability of VBAC in TOLAC is 60-80% but on an individual basis the success rate depends on demographic and obstetric charactorisitics. For example a women who has a C-section for breech presentation would have a good chance of achieving VBAC whereas a woman who a c-section because of arrest of labor is less likely to succeed.Rate this question:
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- 2.
The Benefits of VBAC over cesarean could be all of the following EXCEPT:
- A.
Reduced rates of hemorrhage
- B.
Reduced rates of infection
- C.
Shorter recovery period
- D.
Reduced risk of endometritis
Correct Answer
D. Reduced risk of endometritisExplanation
VBAC (Vaginal Birth After Cesarean) is a preferred option for many women who have previously undergone a cesarean section. It offers several benefits over a repeat cesarean, including reduced rates of hemorrhage, infection, and endometritis. However, the given answer states that the benefit of VBAC over cesarean is not a reduced risk of endometritis. This implies that there might be no significant difference in the occurrence of endometritis between VBAC and cesarean births.Rate this question:
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- 3.
One of the risks of TOLAC that most significantly affects maternal and neonatal morbidity is?
- A.
Increased length of labor
- B.
Uterine rupture
- C.
Infection
Correct Answer
B. Uterine ruptureExplanation
The overall risk of Uterine Rupture in TOLAC is small, 0.5 - 0.9% however it is associated with such high morbidity and mortality for the fetus and the mother it deserves special consideration. Factors that increase the risk of rupture were previous classical incision, macrosomia, gestation beyond 40 wks and induction and augmentation of labor. The studies with a largest number of patients are retrospective studies that looked at discharge diagnosis to gather data and didn’t account for hospital course, confounding factors and the extent to which each risk factor was present.Rate this question:
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- 4.
Risk factors that have been shown to increase the risk of uterine rupture are all of the following EXCEPT:
- A.
Augmentation of labor
- B.
Gestation beyond 40 weeks
- C.
Previous classical C/S uterine incision
- D.
Twin gestation
- E.
Unknown previous C/S uterine incision
Correct Answer
D. Twin gestationExplanation
Twin gestations showed equal probability for success in VBAC when compared to singleton pregnancies and had no greater risk of uterine rupture.Rate this question:
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- 5.
Factors that decrease chances of successful VBAC in TOLAC are all of the following EXCEPT:
- A.
Increased maternal age
- B.
Pre-eclampsia
- C.
Short interpregnancy interval
- D.
Spontaneous labor
- E.
Gestational age greater than 40 weeks
- F.
Maternal obesity
Correct Answer
D. Spontaneous laborExplanation
Factors that increase the likelihood of successful VBAC are:
- Prior Vaginal deliveries
- Spontaneous Labor
Factors that decrease the likelihood of successful VBAC are:
- Increased maternal age
- Non-White ethnicity
- Gestational age greater than 40 weeks
- Maternal obesity
- Preeclampsia
- Short interpregnancy interval
- Increased neonatal birth weight
- Recurrent indication for initial cesarean delivery (like labor dystocia)Rate this question:
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Current Version
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Mar 21, 2023Quiz Edited by
ProProfs Editorial Team -
Oct 27, 2013Quiz Created by
Obgynume
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