Vaginal Birth After Cesarean — MCQs
In pregnancies complicated by intrauterine growth restriction (IUGR) with otherwise reassuring fetal surveillance, what is the recommended gestational age for planned delivery to optimize neonatal outcomes?
Which of the following is NOT a recommended prevention strategy for vertical transmission of HIV?
A 37-year-old G2P1 woman at 38 weeks' gestation presents to the obstetrics clinic for a prenatal visit. The patient had difficulty becoming pregnant but was successful after using in vitro fertilization. She has a history of recurrent herpes outbreaks and is currently experiencing genital pain and tingling. Her first pregnancy was complicated by failure to progress, which resulted in a cesarean birth. Routine rectovaginal culture at 36 weeks was positive for Group B streptococci. Which of the following would be an absolute indication for delivering the child by LSCS (Lower Segment Cesarean Section):
How do you manage placenta accreta?
Incidence of scar rupture in previous lower segment caesarean section:
A 32 year old pregnant woman presents with 36 week pregnancy with complaints of pain abdomen and decreased fetal movements. Upon examination PR= 96/min, BP = 156/100 mm Hg, FHR = 128 bpm. On per-vaginum examination there is altered blood seen and cervix is soft 1 cm dilated. What is the preferred management?
Which of the following is an absolute indication for elective repeat caesarean section in a patient with previous caesarean delivery?
Female with 41 wk gestation confirmed by radiological investigation, very sure of her LMP, no uterine contractions, no effacement and no dilatation. What should be done to induce labor?
A primigravida is in labor. Her per-vaginal examination revealed a posterior cervix with 5 cm cervical length, 1 cm dilatation, soft consistency, and head at -1 station. Calculate the Bishop score.
A lady with 36-week pregnancy with previous C-section comes with low BP, tachycardia, and on USG fluid present in peritoneum. What is the diagnosis and next management?
Vaginal Birth After Cesarean Indian Medical PG Practice Questions and MCQs
Question 1: In pregnancies complicated by intrauterine growth restriction (IUGR) with otherwise reassuring fetal surveillance, what is the recommended gestational age for planned delivery to optimize neonatal outcomes?
- A. 39 weeks
- B. 37 weeks
- C. 40 weeks
- D. 38 weeks (Correct Answer)
Explanation: ***38 weeks*** - For pregnancies complicated by **IUGR (Intrauterine Growth Restriction)** with reassuring fetal surveillance, planned delivery at **38-39 weeks** is recommended by **ACOG guidelines** to optimize neonatal outcomes. - Among the given options, **38 weeks** represents the earliest point in this recommended range, balancing the risks of continued intrauterine compromise with the risks of **prematurity** such as **respiratory distress syndrome**. - This timing is appropriate for **mild to moderate IUGR** without concerning Doppler findings or other complications. *39 weeks* - **39 weeks** is actually within the acceptable range (38-39 weeks) for IUGR delivery per current guidelines. - However, many obstetricians prefer **38 weeks** to minimize the risk of continued **fetal compromise** from **placental insufficiency**, making 38 weeks the more commonly cited benchmark. - The distinction between 38 and 39 weeks is nuanced and depends on individual case factors and surveillance findings. *37 weeks* - Delivery at **37 weeks** is considered **early term** and carries higher risk of **neonatal morbidities**, particularly **respiratory complications** and **hypoglycemia**. - This timing may be appropriate for **severe IUGR** with abnormal **umbilical artery Doppler** findings, **absent or reversed end-diastolic flow**, or other concerning features, but not for routine IUGR with reassuring surveillance. - It is not the standard recommendation for uncomplicated IUGR to optimize outcomes. *40 weeks* - Delivering at **40 weeks** in an IUGR pregnancy is **not recommended** due to increased risk of **stillbirth** and complications from ongoing **placental insufficiency**. - The risks of adverse outcomes escalate with expectant management beyond 38-39 weeks in IUGR pregnancies. - Minimal additional fetal growth occurs beyond this point while risks continue to increase.
Question 2: Which of the following is NOT a recommended prevention strategy for vertical transmission of HIV?
- A. Elective cesarean at 40 weeks (Correct Answer)
- B. Avoidance of breastfeeding
- C. Intrapartum zidovudine
- D. Antiretroviral therapy during pregnancy
Explanation: ***Elective cesarean at 40 weeks*** - This is **NOT recommended** as stated because: - When elective cesarean section is indicated (viral load >1000 copies/mL), it should be performed at **38 weeks gestation**, NOT 40 weeks - At 40 weeks, there's increased risk of spontaneous labor and membrane rupture, which defeats the purpose of elective cesarean - With adequate viral suppression (<1000 copies/mL or undetectable), **vaginal delivery is safe** and cesarean is not routinely recommended - The decision for cesarean is based on **viral load**, not simply gestational age *Avoidance of breastfeeding* - **Breastfeeding** is a known route of vertical HIV transmission due to the presence of the virus in breast milk - In developed countries where safe alternatives are available, **formula feeding** is recommended to completely eliminate this risk - This IS a recommended prevention strategy *Intrapartum zidovudine* - **Intravenous zidovudine (AZT)** administered during labor effectively reduces HIV transmission from mother to child - This is a crucial component of the prevention protocol, especially for mothers with detectable viral loads or those who have not received full antiretroviral therapy - This IS a recommended prevention strategy *Antiretroviral therapy during pregnancy* - **Antiretroviral therapy (ART)** taken throughout pregnancy significantly lowers the maternal viral load, which is the most critical factor in preventing vertical transmission - Suppressing the viral load to **undetectable levels** before delivery is the primary goal and most effective strategy - This IS a recommended prevention strategy
Question 3: A 37-year-old G2P1 woman at 38 weeks' gestation presents to the obstetrics clinic for a prenatal visit. The patient had difficulty becoming pregnant but was successful after using in vitro fertilization. She has a history of recurrent herpes outbreaks and is currently experiencing genital pain and tingling. Her first pregnancy was complicated by failure to progress, which resulted in a cesarean birth. Routine rectovaginal culture at 36 weeks was positive for Group B streptococci. Which of the following would be an absolute indication for delivering the child by LSCS (Lower Segment Cesarean Section):
- A. History of previous cesarean section
- B. Current symptoms of genital pain and tingling (Correct Answer)
- C. Maternal colonization with Group B streptococci
- D. In vitro fertilization
Explanation: ***Current symptoms of genital pain and tingling*** - **Genital pain and tingling** in a patient with a history of recurrent herpes outbreaks strongly suggests a **prodromal or active herpes outbreak**. - An active maternal **genital herpes lesion** at the time of labor is an absolute indication for **cesarean delivery** to prevent neonatal herpes simplex virus (HSV) infection, which can be life-threatening. *History of previous cesarean section* - A **prior cesarean section** is a relative indication for a repeat cesarean, but many women are candidates for a **trial of labor after cesarean (TOLAC)** if certain criteria are met. - It is not an absolute contraindication to vaginal delivery itself, especially if the previous cesarean was for a non-recurrent indication like **failure to progress**. *Maternal colonization with Group B streptococci* - **Group B streptococcus (GBS) colonization** is typically managed with **intrapartum antibiotic prophylaxis (IAP)** to prevent early-onset neonatal GBS disease. - It does not necessitate a cesarean section for delivery; rather, antibiotics are given once labor begins or membranes rupture. *In vitro fertilization* - **In vitro fertilization (IVF)** is a method of conception and does not inherently determine the mode of delivery. - Pregnancy achieved through IVF does not, by itself, increase the risk of complications that would mandate a **cesarean section**, unless there are other associated factors like multiple gestations or specific maternal conditions.
Question 4: How do you manage placenta accreta?
- A. Classical cesarean; hysterectomy (Correct Answer)
- B. Low vertical cesarean; hysterectomy
- C. Low transverse cesarean; hysterectomy
- D. Classical cesarean; myometrial resection
Explanation: ***Classical cesarean; hysterectomy*** - A **classical cesarean section** (vertical incision in the upper uterine segment) allows for delivery of the fetus without disturbing the **placenta accreta** in the lower uterine segment. - Subsequent **hysterectomy** is often necessary due to the high risk of severe hemorrhage from the morbidly adherent placenta, which cannot be safely separated. *Low vertical cesarean; hysterectomy* - A **low vertical incision** is made in the lower uterine segment, which could potentially incise through the placenta accreta if it extends to that region, leading to significant hemorrhage. - While hysterectomy is likely indicated, the initial uterine incision might complicate management. *Low transverse cesarean; hysterectomy* - A **low transverse incision** is the most common type for routine cesarean sections but is contra-indicated in placenta accreta as the placenta is frequently implanted in the lower uterine segment. - Incising through the **placenta** during a low transverse cut would cause immediate massive hemorrhage, making this approach unsuitable. *Classical cesarean; myometrial resection* - While a **classical cesarean** would be the appropriate initial step for fetal delivery, **myometrial resection** to remove only the affected area of the myometrium is generally insufficient and carries a high risk of residual placental tissue and severe hemorrhage, often necessitating a hysterectomy anyway. - This approach is typically not recommended as a primary definitive management strategy for established placenta accreta.
Question 5: Incidence of scar rupture in previous lower segment caesarean section:
- A. 5%
- B. 7%
- C. 6%
- D. 1% (Correct Answer)
Explanation: ***1%*** - The incidence of **uterine rupture** in a subsequent pregnancy after a **low transverse uterine incision** (previous lower segment caesarean section) is approximately **0.5-1%**. This low risk allows for considering a trial of labor after cesarean (TOLAC) in appropriate candidates. - This value represents the general risk and is a critical factor in counseling patients about the safety of **vaginal birth after cesarean (VBAC)**. *5%* - An incidence of **5%** for scar rupture is significantly higher than what is observed for a **lower segment caesarean section**. - This higher percentage might be associated with a **classical uterine incision** (vertical incision in the upper uterine segment) which carries a much greater risk of uterine rupture. *7%* - A **7%** incidence of scar rupture is also substantially higher than the typical risk associated with a previous **lower segment caesarean section**. - This rate would generally be considered prohibitive for most cases of **TOLAC** due to the increased maternal and fetal risks. *6%* - An incidence of **6%** for scar rupture is not consistent with the known rates for a **lower segment caesarean section**. - This figure indicates a risk much higher than the actual average and would likely lead to recommendations against **TOLAC**.
Question 6: A 32 year old pregnant woman presents with 36 week pregnancy with complaints of pain abdomen and decreased fetal movements. Upon examination PR= 96/min, BP = 156/100 mm Hg, FHR = 128 bpm. On per-vaginum examination there is altered blood seen and cervix is soft 1 cm dilated. What is the preferred management?
- A. Observation and monitoring
- B. Perform cesarean section (Correct Answer)
- C. Initiate labor induction
- D. Administer medications to delay labor
Explanation: ***Perform cesarean section*** - The clinical presentation strongly suggests **placental abruption**: abdominal pain, decreased fetal movements, hypertension (risk factor), and altered blood per vaginum - **Decreased fetal movements** with FHR at 128 bpm (lower end of normal) indicates **potential fetal compromise** - At **36 weeks gestation**, the fetus is viable and immediate delivery is warranted when abruption is suspected with fetal distress - **Emergency cesarean section** is the preferred management for placental abruption with signs of fetal compromise, as it provides the fastest route to delivery - Attempting vaginal delivery in suspected abruption with fetal distress risks further compromise and maternal hemorrhage *Initiate labor induction* - Labor induction is **contraindicated** in suspected placental abruption with fetal compromise - Induction takes hours to achieve delivery, during which time the fetus may deteriorate further and maternal bleeding may worsen - The presence of altered blood, decreased fetal movements, and hypertension makes this a **high-risk scenario** requiring immediate delivery, not a gradual process - Induction might be considered only in very mild, stable cases of abruption without fetal distress, which is not the case here *Observation and monitoring* - The clinical findings indicate an **obstetric emergency** (suspected placental abruption), not a condition suitable for expectant management - **Decreased fetal movements** are a warning sign of fetal hypoxia requiring immediate action - Progressive abruption can lead to **maternal hemorrhage, DIC, and fetal death** if not managed promptly - At 36 weeks with concerning features, continued observation risks catastrophic outcomes *Administer medications to delay labor* - **Tocolytics are absolutely contraindicated** in placental abruption - Delaying delivery when abruption is suspected and fetal compromise is present would worsen both maternal and fetal outcomes - At 36 weeks gestation, the fetus has adequate maturity and there is no benefit to prolonging pregnancy - The goal is **expedited delivery**, not pregnancy prolongation
Question 7: Which of the following is an absolute indication for elective repeat caesarean section in a patient with previous caesarean delivery?
- A. Placenta accreta spectrum
- B. Previous classical incision (Correct Answer)
- C. Failed TOLAC (Trial of Labor After Cesarean)
- D. Uterine rupture/scar dehiscence
Explanation: ***Previous classical incision*** - A **classical incision** (vertical uterine incision in the upper uterine segment) carries a **4-9% risk of uterine rupture** in subsequent pregnancies, compared to 0.5-1% with low transverse incisions. - **VBAC (Vaginal Birth After Cesarean) is absolutely contraindicated** with a previous classical incision due to the high rupture risk. - This is a **standing absolute indication** for elective repeat cesarean section at 36-37 weeks gestation. - Other absolute indications include previous T-incision, J-incision, and previous uterine rupture. *Uterine rupture/scar dehiscence* - **Uterine rupture** is a catastrophic **intrapartum emergency** requiring immediate cesarean delivery. - This is not a pre-existing "indication" but rather an **acute complication** that occurs during labor. - Previous uterine rupture (not active rupture) would be an absolute indication for planned repeat C-section. *Placenta accreta spectrum* - This involves abnormal placental invasion and is strongly associated with previous C-sections. - While it requires cesarean delivery with possible hysterectomy, it is a **complication of placental implantation**, not a direct indication based on the previous uterine incision type. - It necessitates C-section but is not specific to the type of previous cesarean scar. *Failed TOLAC (Trial of Labor After Cesarean)* - A **failed TOLAC** means cesarean delivery is required because vaginal delivery could not be achieved. - This is an **intrapartum decision** based on failure to progress or fetal compromise, not a pre-existing indication for planned repeat C-section.
Question 8: Female with 41 wk gestation confirmed by radiological investigation, very sure of her LMP, no uterine contractions, no effacement and no dilatation. What should be done to induce labor?
- A. PGE1 tab (Correct Answer)
- B. PGE2 gel
- C. PGF2alpha
- D. Intracervical foley’s
Explanation: ***PGE1 tab*** - **Misoprostol (PGE1)** is an effective agent for **cervical ripening** and labor induction in cases of an unfavorable cervix (no effacement, no dilatation). - It is cost-effective, stable at room temperature, and widely used in resource-limited settings. - Can be administered orally or vaginally with good efficacy for cervical ripening at term. - In this post-term pregnancy with unfavorable cervix, pharmacological ripening is appropriate. *PGE2 gel* - **PGE2 (dinoprostone)** gel or cervical insert is also an effective option for cervical ripening. - Both PGE1 and PGE2 are acceptable first-line agents; the choice may depend on availability, cost, and institutional protocols. - PGE2 formulations are FDA-approved and widely used, though may be more expensive than misoprostol. *PGF2alpha* - **PGF2alpha (carboprost)** is primarily used for the **management of postpartum hemorrhage** due to its potent myometrial contracting effect. - It is **not indicated** for induction of labor at term as its strong uterine contractions can cause excessive uterine stimulation and fetal distress. *Intracervical foley's* - An **intracervical Foley catheter** is a mechanical method that causes cervical ripening through direct pressure and stimulation of local prostaglandin release. - It is an evidence-based alternative with lower risk of uterine hyperstimulation compared to pharmacological methods. - Both mechanical and pharmacological methods are acceptable first-line options for cervical ripening in post-term pregnancy with unfavorable cervix.
Question 9: A primigravida is in labor. Her per-vaginal examination revealed a posterior cervix with 5 cm cervical length, 1 cm dilatation, soft consistency, and head at -1 station. Calculate the Bishop score.
- A. 5 (Correct Answer)
- B. 0
- C. 8
- D. 3
Explanation: ***5*** - The Bishop score calculation: **cervical position** (posterior = 0), **cervical effacement** (5 cm length = 0), **dilation** (1 cm = 1), **consistency** (soft = 2), and **station** (-1 = 1). - According to standard **Dutta textbook** references, this totals to 5 points (0 + 0 + 1 + 2 + 1), with soft consistency correctly scoring 2 points. *3* - This score incorrectly assigns only **1 point for soft consistency** instead of the standard 2 points. - The miscalculation underestimates the **cervical readiness** for labor induction. *0* - A score of 0 would require all parameters to be at their **minimum values** (firm consistency, closed cervix, high station). - The given parameters show **1 cm dilation**, **soft consistency**, and **-1 station**, each contributing positive points. *8* - A high score of 8 indicates a **very favorable cervix** with significant effacement, anterior position, and greater dilation. - The current findings show **minimal effacement** (5 cm length), **posterior position**, and only **1 cm dilation**, inconsistent with such a high score.
Question 10: A lady with 36-week pregnancy with previous C-section comes with low BP, tachycardia, and on USG fluid present in peritoneum. What is the diagnosis and next management?
- A. Abruptio and C-section
- B. Ectopic pregnancy and abortion
- C. Impending dehiscence and Laparoscopy
- D. Uterine scar rupture with Laparotomy (Correct Answer)
Explanation: ***Uterine scar rupture with Laparotomy*** - The presentation of **low blood pressure**, **tachycardia**, and **free fluid in the peritoneum** in a 36-week pregnant woman with a **previous C-section** is highly indicative of uterine scar rupture given the signs of **hemorrhagic shock**. - **Laparotomy** (emergency abdominal surgery) is the immediate and definitive management to repair the ruptured uterus, control bleeding, and deliver the fetus. *Abruptio and C-section* - **Placental abruption** typically presents with painful vaginal bleeding, uterine tenderness, and fetal distress, which are not explicitly mentioned as the primary symptoms here. - While a **C-section** would be indicated for abruption, the presence of free fluid in the peritoneum and hemodynamic instability in a woman with a prior C-section points more towards rupture. *Ectopic pregnancy and abortion* - An **ectopic pregnancy** is ruled out by the 36-week gestational age; these occur much earlier in pregnancy. - An **abortion** refers to the termination of pregnancy and does not cause these specific signs and symptoms at 36 weeks. *Impending dehiscence and Laparoscopy* - **Impending dehiscence** (separation of the uterine scar without complete rupture) would likely cause localized pain but typically not the severe signs of **hypovolemic shock** and free peritoneal fluid seen here. - **Laparoscopy** is a minimally invasive procedure and would not be appropriate for the emergency management of a potentially life-threatening hemorrhage from uterine rupture.
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