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Quizzes > Health & Medicine > Human Anatomy & Medicine

VBAC vs C-Section Quiz: Test Your Knowledge

Dive into this vaginal birth after cesarean quiz and find out if you're VBAC-eligible!

Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art illustration for VBAC vs C-Section quiz on golden yellow background

Expectant parents and birth professionals, are you ready to deep-dive into delivery decisions? Take our free vbac or c-section quiz to test your knowledge on VBAC eligibility, timing, contraindications, facility requirements, and common VBAC risks. Also benefit from our quick VBAC eligibility quiz to check if you qualify, plus insights from a brief vaginal birth after cesarean quiz. Ideal for parents-to-be, doulas and curious birth enthusiasts, this interactive childbirth quiz offers instant feedback, expert tips, and confidence-building guidance. Dive in now to learn, empower your decisions, and navigate your path toward the gentle birth you envision!

What does VBAC stand for?
Vaginal Birth After Cesarean
Very Big Abdominal Closure
Ventral Birth Assisted Cesarean
Vaginal Breach And Cesarean
VBAC is the acronym for Vaginal Birth After Cesarean and refers to a vaginal delivery in a woman who has had a previous cesarean section. It’s a common term used in obstetrics to discuss delivery options after cesarean. VBAC can reduce maternal morbidity associated with repeat cesarean surgeries. More on VBAC
Which type of uterine incision is most favorable for a VBAC attempt?
Low transverse incision
Classical (vertical) incision
T-shaped incision
Low vertical incision
A low transverse uterine incision carries the lowest risk of uterine rupture in a subsequent labor and is therefore the most favorable type for attempting VBAC. Classical or vertical incisions have a higher risk of dehiscence and are generally contraindications to VBAC. The T-shaped and low vertical incisions also confer increased rupture risk compared to a low transverse. Incision Types & VBAC
How many prior low transverse cesarean deliveries do most guidelines recommend as the upper limit for a VBAC attempt?
One previous low transverse cesarean
Two previous low transverse cesareans
Three or more previous cesareans
No limit on number of prior cesareans
Most guidelines recommend a single prior low transverse cesarean as the standard indication for VBAC. Although some centers may consider two prior low transverse cesareans under strict criteria, evidence is most robust for one previous incision. There is limited data on VBAC safety after multiple cesareans, so caution is advised. ACOG VBAC Guidance
What is the minimum recommended interval between a cesarean delivery and an attempted VBAC?
6 months
12 months
18 months
24 months
An inter-delivery interval of at least 18 months is recommended to allow uterine healing and reduce the risk of rupture. Shorter intervals have been associated with a higher risk of complications like uterine dehiscence. While some studies suggest 12 months may be acceptable, 18 months is the commonly advised minimum. ACOG Interval Recommendations
Which of the following is an absolute contraindication to attempting a VBAC?
Placenta previa
Macrosomia
Advanced maternal age
One prior cesarean section
Placenta previa, where the placenta covers the cervix, is an absolute contraindication to vaginal delivery because of hemorrhage risk. Macrosomia or advanced maternal age may influence VBAC success but are not absolute contraindications. One prior cesarean with a favorable incision is the usual indication for attempting VBAC. Contraindications for VBAC
Which facility requirement is recommended for a safe VBAC attempt?
Immediate availability of surgical and anesthesia teams
Caps on operative deliveries per day
Permission for home birth under midwife care
24-hour neonatology on-site only on weekends
VBAC should be attempted in a facility with immediate access to surgical and anesthesia services in case an urgent cesarean is needed. This reduces maternal and fetal risks associated with uterine rupture or other emergencies. Remote or home settings lack these critical resources. Facility Requirements
A sudden, prolonged fetal heart rate bradycardia during a VBAC trial is most suggestive of:
Uterine rupture
Early deceleration
Variable deceleration
Tachysystole
A sudden, prolonged fetal bradycardia during labor in a woman attempting VBAC raises concern for uterine rupture, which compromises fetal oxygenation. Early or variable decelerations are usually benign or related to cord compression, not catastrophic. Immediate evaluation and often surgical intervention are warranted if rupture is suspected. Uterine Rupture Signs
Which induction agent is contraindicated for cervical ripening in a VBAC attempt due to increased uterine rupture risk?
Misoprostol (PGE1)
Mechanical (Foley) catheter
Oxytocin infusion
Dinoprostone (PGE2) gel
Misoprostol (PGE1) is associated with a higher risk of uterine hyperstimulation and rupture in women with a prior cesarean and is generally contraindicated for VBAC. Mechanical methods and cautious oxytocin use are preferred. Dinoprostone is used with caution but has a lower rupture risk than misoprostol. Induction in VBAC
Which previous uterine incision is generally considered an absolute contraindication to VBAC?
Classical (vertical) uterine incision
Single low transverse incision
Low vertical incision
T-shaped incision
A classical vertical uterine incision is considered an absolute contraindication to VBAC because of the significantly elevated risk of uterine rupture. Low transverse and, in some cases, low vertical incisions carry lower risks and may be considered for VBAC under appropriate conditions. T-shaped incisions are rarely used and have higher rupture risk but classification varies. Incision Contraindications
Which form of analgesia is considered safe and recommended during a VBAC attempt?
Epidural analgesia
General anesthesia
Pudendal block only
Nitrous oxide only
Epidural analgesia is safe for women attempting VBAC and does not increase the risk of cesarean or uterine rupture. It allows for rapid surgical anesthesia if an emergency cesarean becomes necessary. General anesthesia is reserved for operative deliveries and not used for labor analgesia. Analgesia in VBAC
What is the approximate success rate of VBAC in appropriately selected women?
60–80%
20–40%
>90%
40–60%
Multiple studies show that VBAC success rates range from 60% to 80% in women with one prior low transverse cesarean and no contraindications. Success is influenced by factors such as prior vaginal birth, BMI, and indication for the first cesarean. Rates significantly lower than 60% or above 90% are not typical in uncomplicated cases. VBAC Success Rates
Which type of fetal monitoring is recommended during a trial of labor after cesarean?
Continuous electronic fetal monitoring
Intermittent auscultation every 30 minutes
Doppler assessment every hour
No monitoring unless complications arise
Continuous electronic fetal monitoring is recommended during a VBAC attempt to detect early signs of uterine rupture or fetal distress. Intermittent auscultation may miss sudden decelerations characteristic of rupture. Close, ongoing monitoring enables prompt intervention if needed. Monitoring in VBAC
According to ACOG, women with two prior low transverse cesareans may be offered a VBAC if:
They have no other contraindications and care is in a facility with surgical backup
They have not had a prior vaginal delivery
They are under age 30
They decline continuous monitoring
ACOG indicates that VBAC may be offered to women with two prior low transverse cesarean deliveries if there are no additional contraindications and they deliver in a setting with immediate surgical and anesthesia availability. Prior vaginal delivery is beneficial but not strictly required. Continuous monitoring is essential, not optional. ACOG VBAC Recommendations
Which maternal factor is associated with a lower likelihood of successful VBAC?
Obesity (BMI ?30)
Prior vaginal birth
Spontaneous labor onset
Age under 35
Obesity (BMI ?30) is linked to a decreased chance of VBAC success due to slower labor progress and increased cesarean risk. Prior vaginal birth and spontaneous labor onset increase success rates, and maternal age under 35 is also favorable. Managing BMI and weight gain can improve VBAC outcomes. VBAC Success Factors
According to ACOG guidelines, how should oxytocin augmentation be managed during a VBAC trial to minimize uterine rupture risk?
Start at 1–2 mU/min and increase no more frequently than every 15–30 minutes
Begin at 10 mU/min and double every 5 minutes
Use a continuous high-dose infusion throughout labor
Avoid oxytocin entirely in VBAC attempts
ACOG recommends a low-dose oxytocin protocol for VBAC augmentation, starting at 1–2 mU/min with incremental increases no more frequently than every 15–30 minutes to reduce hyperstimulation and uterine rupture risk. High-dose regimens or rapid escalation are discouraged. Oxytocin need not be avoided but must be titrated carefully. Oxytocin in VBAC
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Study Outcomes

  1. Understand distinctions between VBAC and C-Section -

    Summarize the benefits, risks, and indications that differentiate vaginal birth after cesarean from repeat cesarean delivery.

  2. Determine VBAC eligibility -

    Assess criteria such as prior uterine incision type, pregnancy history, and maternal health to decide suitability for a vaginal birth after cesarean.

  3. Identify contraindications and risks -

    Recognize medical conditions and scenarios that may preclude or complicate a VBAC attempt.

  4. Analyze timing and facility requirements -

    Evaluate when and where a VBAC should be performed, including appropriate staffing, equipment availability, and emergency protocols.

  5. Apply insights from the vbac or c-section quiz -

    Leverage scenario-based questions to practice clinical decision-making for delivery options.

  6. Enhance patient counseling confidence -

    Use key facts from the VBAC quiz to support clear, informed discussions about birth options with expectant mothers.

Cheat Sheet

  1. Eligibility Criteria for VBAC -

    When prepping for a vbac or c-section quiz, recall that a candidate must have a single low transverse cesarean incision with no other uterine scars and a clinically adequate pelvis. VBAC quiz modules often test knowledge of ACOG guidelines like absence of prior uterine rupture or classical incision. Remember the TOLAC acronym (Trial Of Labor After Cesarean) to anchor eligibility basics.

  2. Interdelivery Interval -

    Many VBAC risks quiz questions focus on uterine rupture rates tied to interpregnancy intervals, showing that at least 18 months cuts risk substantially. Use the mnemonic "GAP" - Greater than 18 months Avoids rupture Potential - to lock in this interval. Shorter gaps call for heightened monitoring and shared decision-making.

  3. Contraindications to VBAC -

    Absolute contraindications include placenta previa, classical uterine incisions, and vertical fundal scars, all raising rupture risk. The vaginal birth after cesarean quiz may ask you to distinguish these from relative contraindications like suspected macrosomia or breech position. Always consult ACOG's committee opinions for the most current contraindication list before taking the VBAC quiz.

  4. Facility Resource Requirements -

    A VBAC attempt must occur in a facility with 24/7 anesthesia, surgical teams, and blood products on hand. Remember the "30-minute rule" - surgical and anesthesia teams should be ready to intervene within half an hour. Checking your hospital's readiness against ACOG facility guidelines is essential for safe VBAC attempts.

  5. Risks and Benefits Counseling -

    Proper counseling balances the approximately 0.5 - 1% uterine rupture risk, often tested in a VBAC quiz, against benefits like reduced surgical complications and quicker recovery. Employ the "5 Rs" mnemonic - Risks, Recovery, Reproductive goals, Prior history, and Readiness - to cover all counseling points comprehensively. Strong patient-provider communication boosts confidence and decision quality in any vbac or c-section quiz scenario.

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