Labor and Delivery — MCQs

A woman with mitral stenosis but no pulmonary hypertension is in labor at 39 weeks of gestation. She has dyspnea on exertion and a pulse rate of 80 bpm. There are no basal crepitations in the lungs. The cervix is 4 cm dilated, and she is having 1-2 uterine contractions in 10 minutes. Which of the following steps is best avoided in her management?

Q109Medium

Hypertonic dysfunctional labor is generally characterized by:

Q110Medium

A 25-year-old nulliparous woman at 35 weeks' gestation presents with contractions, headache, and visual disturbances. Her pregnancy has been uncomplicated. Her temperature is 37 C, blood pressure is 160/110 mm Hg, pulse is 88/minute, and respirations are 12/minute. Examination reveals a cervix that is 2 cm dilated and 75% effaced, with contractions occurring every 2 minutes. Fetal heart rate is in the 140s and reactive. Urinalysis shows 3+ proteinuria. Laboratory values: leukocytes 9,400/mm3, hematocrit 35%, platelets 101,000/mm3, AST 200 U/L, and ALT 300 U/L. What is the most appropriate next step in management?

Labor and Delivery Indian Medical PG Practice Questions and MCQs

Question 101: What is the graphical record of cervical dilatation in centimeters against duration of labour in hours called?

A. Partogram (Correct Answer)
B. Pictogram
C. Hysterograph
D. Amniograph

Explanation: ### Explanation **Correct Option: A. Partogram** A **Partogram** (or Partograph) is a composite graphical record of key data (maternal and fetal) during labor. The most critical component of the partogram is the plotting of **cervical dilatation (in cm)** on the Y-axis against **time (in hours)** on the X-axis. It serves as an early warning system to detect prolonged or obstructed labor, allowing for timely interventions like augmentation or Cesarean section. **Analysis of Incorrect Options:** * **B. Pictogram:** This is a general term for a diagram representing data through pictures. In medicine, it may refer to visual aids for patient instructions but has no specific role in monitoring labor. * **C. Hysterograph:** This refers to the recording of uterine contractions (hysterography) or an X-ray of the uterus (hysterosalpingography). While contractions are part of labor, the specific graph of dilatation vs. time is not called a hysterograph. * **D. Amniograph:** This refers to the radiological study of the amniotic cavity after injecting a contrast medium. It is not used for routine labor monitoring. **High-Yield Clinical Pearls for NEET-PG:** * **Friedman’s Curve:** The original partogram was based on Friedman’s sigmoid curve of labor. * **WHO Partograph:** The modified WHO partograph starts only when the **active phase** begins (cervical dilatation ≥ 4 cm). * **Alert Line:** A diagonal line starting at 4 cm; if the labor curve crosses to the right of this line, it indicates sluggish progress. * **Action Line:** Usually 4 hours to the right of the Alert line; crossing this line indicates the need for definitive management to end labor. * **Latent Phase:** Normally lasts <20 hours in primigravida and <14 hours in multigravida.

Question 102: What is the term for the relation of different parts of the fetus to one another?

A. Fetal station
B. Fetal attitude (Correct Answer)
C. Fetal lie
D. Fetal presentation

Explanation: **Explanation:** The correct answer is **B. Fetal attitude**. **1. Understanding Fetal Attitude:** Fetal attitude refers to the relationship of the fetal body parts to one another. The characteristic "universal attitude" of the fetus is **flexion**. In this posture, the head is flexed on the chest, the arms are folded across the chest, the thighs are flexed on the abdomen, and the legs are bent at the knees. This compact posture allows the fetus to occupy the smallest possible space within the uterine cavity. **2. Why the other options are incorrect:** * **Fetal Station (A):** Refers to the level of the presenting part in the birth canal in relation to the **ischial spines** of the maternal pelvis (measured in centimeters). * **Fetal Lie (C):** Refers to the relationship between the **long axis of the fetus** and the long axis of the mother (e.g., longitudinal, transverse, or oblique). * **Fetal Presentation (D):** Refers to the part of the fetus that lies over the pelvic inlet or is foremost in the birth canal (e.g., cephalic, breech, or shoulder). **3. NEET-PG Clinical Pearls:** * **Abnormal Attitude:** Extension of the fetal head (deflexion) changes the presenting diameter. For example, a fully extended head results in a **Face presentation** (Submentobregmatic diameter). * **The "Military" Attitude:** This occurs when the head is midway between flexion and extension, leading to a **Brow presentation** (Mentovertical diameter), which is the largest and most unfavorable diameter for vaginal delivery. * **High-Yield Fact:** The most common fetal lie is **longitudinal** (99%), and the most common attitude is **flexion**.

Question 103: A 25-year-old woman, G2 P1 with a prior cesarean delivery, is in labor. The fetal heart rate monitor shows the tracing seen in the image. What is your diagnosis?

A. Cord compression
B. Uterine rupture (Correct Answer)
C. Fetal anemia
D. Amniotic fluid embolism

Explanation: ***Uterine rupture*** - **Sudden prolonged fetal bradycardia** in a woman with **prior cesarean delivery** attempting **VBAC** (vaginal birth after cesarean) is highly suggestive of uterine rupture. - The **previous cesarean scar** creates a weak point in the uterine wall that can rupture during labor, causing immediate fetal compromise and maternal hemorrhage. *Cord compression* - Typically presents with **variable decelerations** that correlate with uterine contractions, not sudden prolonged bradycardia. - The fetal heart rate pattern would show **abrupt drops** followed by **rapid return to baseline** between contractions. *Fetal anemia* - Characterized by a **sinusoidal fetal heart rate pattern** with smooth, wave-like oscillations of 5-15 beats per minute. - Would not present as **sudden prolonged bradycardia** but rather as a continuous undulating pattern. *Amniotic fluid embolism* - Primarily causes **sudden maternal cardiovascular collapse** with hypotension, respiratory distress, and coagulopathy. - The fetal heart rate changes are **secondary to maternal compromise**, not the primary presenting feature.

Question 104: Rupture of membranes is said to be premature when it occurs:

A. At 38 weeks of pregnancy
B. At 32 weeks of pregnancy
C. Prior to the onset of the first stage of labor (Correct Answer)
D. During the second stage of labor

Explanation: **Explanation:** The definition of **Premature Rupture of Membranes (PROM)** is based on the **timing of the rupture relative to the onset of labor**, rather than the gestational age. 1. **Why Option C is Correct:** PROM is defined as the spontaneous rupture of the amniotic sac **prior to the onset of uterine contractions (labor)**. If this occurs at or after 37 weeks, it is termed "Term PROM." If it occurs before 37 weeks, it is called "Preterm Premature Rupture of Membranes" (PPROM). The hallmark is the absence of cervical changes and regular contractions at the time of rupture. 2. **Why Other Options are Incorrect:** * **Options A & B:** These refer to the **gestational age**. While rupture at 32 weeks is "preterm," it is only "premature" (PROM) if it happens before labor starts. If a woman at 32 weeks starts labor and then her membranes rupture, it is a normal physiological event of preterm labor, not PROM. * **Option D:** Rupture during the second stage is considered a late rupture. Normally, membranes rupture at the end of the first stage (full dilatation). 3. **High-Yield NEET-PG Pearls:** * **Diagnosis:** The gold standard for diagnosis is a sterile speculum exam showing a "pool" of fluid in the posterior vaginal fornix. * **Nitrazine Test:** Turns blue (pH > 6.5) because amniotic fluid is alkaline compared to acidic vaginal discharge. * **Fern Test:** Microscopic "ferning" pattern due to crystallization of estrogen and salts. * **Management:** For Term PROM, induction of labor (usually with Oxytocin) is preferred to reduce the risk of **Chorioamnionitis**. For PPROM (<37 weeks), the focus shifts to expectant management, corticosteroids for lung maturity, and antibiotics (prophylaxis).

Question 105: Delayed labor occurs in which of the following conditions?

A. Early use of epidural anesthesia with analgesia
B. Early use of analgesia
C. Unripened cervix
D. All of the above (Correct Answer)

Explanation: **Explanation:** Delayed labor (protracted or arrested labor) refers to a slower-than-normal progression of cervical dilation or fetal descent. The correct answer is **All of the above** because each factor interferes with the physiological mechanisms required for efficient labor. 1. **Early use of Epidural Anesthesia/Analgesia:** Administering epidural anesthesia before the active phase of labor (typically before 4–6 cm dilation) can lead to a relaxation of the pelvic floor muscles. This may interfere with the internal rotation of the fetal head and decrease the maternal urge to push, often prolonging the second stage of labor. 2. **Early use of Analgesia:** Systemic opioids (like Pethidine) given too early can suppress the endogenous release of oxytocin and decrease uterine contractility, leading to primary uterine inertia and a prolonged latent phase. 3. **Unripened Cervix:** A cervix with a low Bishop score (firm, posterior, and uneffaced) offers high resistance to the presenting part. Without adequate cervical "ripening" (softening and thinning), uterine contractions are less effective at causing dilation, significantly delaying the onset of the active phase. **High-Yield Clinical Pearls for NEET-PG:** * **Friedman’s Curve:** Historically used to track labor; a prolonged latent phase is defined as >20 hours in primipara and >14 hours in multipara. * **Active Phase:** According to recent WHO/ACOG guidelines, the active phase starts at **6 cm** dilation (previously 4 cm). * **Bishop Score:** A score of **≤6** indicates an unripe cervix, necessitating induction agents like PGE2 (Dinoprostone). * **Power, Passenger, Passage:** These are the "3 Ps" that determine labor progress. The options in this question primarily affect "Power" (contractions) and "Passage" (cervical resistance).

Question 106: Consumptive coagulopathy is most commonly found in which condition?

A. Abruptio placenta (Correct Answer)
B. Intrauterine contraceptive device (IUCD)
C. Dead fetus
D. Retained products of conception

Explanation: **Explanation:** **Consumptive Coagulopathy (Disseminated Intravascular Coagulation - DIC)** in pregnancy is a pathological activation of the coagulation cascade, leading to the depletion of clotting factors and platelets. **Why Abruptio Placenta is the Correct Answer:** Abruptio placenta is the **most common cause** of DIC in obstetrics. The underlying mechanism involves the release of a massive amount of **thromboplastin** (tissue factor) from the damaged placenta and retroplacental clot into the maternal circulation. This triggers widespread intravascular conversion of fibrinogen to fibrin, leading to the rapid consumption of Factors V, VIII, and fibrinogen, and a secondary activation of the fibrinolytic system. **Analysis of Incorrect Options:** * **Dead Fetus (IUFD):** While a retained dead fetus can cause DIC, it typically takes **3–4 weeks** of retention for the coagulopathy to develop. In modern practice, early induction makes this a less common cause than abruption. * **Retained Products of Conception (RPOC):** These are more commonly associated with postpartum hemorrhage (PHE) due to uterine atony or infection (sepsis) rather than primary consumptive coagulopathy. * **IUCD:** This is a contraceptive method and is not associated with systemic coagulation failure. **NEET-PG High-Yield Pearls:** * **Most common cause of DIC in pregnancy:** Abruptio Placenta. * **Most severe/explosive DIC in pregnancy:** Amniotic Fluid Embolism (AFE). * **Earliest sign of DIC:** Decreased platelet count (thrombocytopenia) and low fibrinogen levels (<150 mg/dL). * **Management Priority:** The definitive treatment for DIC in abruption is the **delivery of the fetus** and replacement of blood products (FFP, Cryoprecipitate).

Question 107: A 32-week pregnant female presented with labor pain. Which of the following is a tocolytic agent?

A. Prazosin
B. Ritodrine (Correct Answer)
C. Yohimbine
D. Propranolol

Explanation: **Explanation:** **Tocolytics** are medications used to suppress uterine contractions to delay preterm labor. The primary goal is to provide a 48-hour window for the administration of corticosteroids (to promote fetal lung maturity) and to facilitate maternal transfer to a tertiary care center. **Correct Option: B. Ritodrine** Ritodrine is a **Beta-2 ($\beta_2$) adrenergic agonist**. It works by binding to $\beta_2$ receptors on the uterine myometrium, which increases intracellular cyclic AMP (cAMP). This leads to a decrease in intracellular calcium levels, resulting in smooth muscle relaxation and the cessation of contractions. While effective, its use has declined due to maternal side effects like tachycardia, pulmonary edema, and hyperglycemia. **Incorrect Options:** * **A. Prazosin:** An alpha-1 ($\alpha_1$) blocker used primarily for hypertension. It does not have a significant effect on uterine contractility. * **C. Yohimbine:** An alpha-2 ($\alpha_2$) antagonist. It is historically used for erectile dysfunction and does not act as a tocolytic. * **D. Propranolol:** A non-selective beta-blocker. By blocking $\beta_2$ receptors, it could theoretically *increase* uterine tone, making it contraindicated if tocolysis is desired. **High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice (DOC):** Currently, **Nifedipine** (Calcium Channel Blocker) is the first-line tocolytic due to its superior safety profile and oral efficacy. * **Atosiban:** A competitive Oxytocin receptor antagonist; highly specific with fewer side effects but expensive. * **Magnesium Sulfate ($MgSO_4$):** Used for **neuroprotection** in preterm labor <32 weeks, though it has weak tocolytic properties. * **Indomethacin:** A COX inhibitor used as a second-line agent; must be avoided after 32 weeks due to the risk of premature closure of the *ductus arteriosus* and oligohydramnios.

Question 108: A woman with mitral stenosis but no pulmonary hypertension is in labor at 39 weeks of gestation. She has dyspnea on exertion and a pulse rate of 80 bpm. There are no basal crepitations in the lungs. The cervix is 4 cm dilated, and she is having 1-2 uterine contractions in 10 minutes. Which of the following steps is best avoided in her management?

A. Active management of the third stage of labor
B. Augmentation of labor with oxytocin
C. Use of epidural analgesia for pain relief
D. Use of ergometrine in the third stage of labor (Correct Answer)

Explanation: In patients with **Mitral Stenosis (MS)**, the primary goal of management is to avoid sudden increases in preload and heart rate to prevent pulmonary edema. ### **Why Ergometrine is Avoided (Correct Answer)** Ergometrine (and Syntometrine) causes **vasoconstriction and a sudden shift of blood** from the peripheral circulation to the central compartment (autotransfusion). In MS, the narrowed mitral valve cannot handle this sudden increase in venous return (preload), leading to a rapid rise in left atrial pressure and a high risk of **acute pulmonary edema**. Therefore, it is strictly contraindicated in cardiac patients. ### **Analysis of Other Options** * **A. Active Management of the Third Stage of Labor (AMTSL):** This is recommended to prevent Postpartum Hemorrhage (PPH). However, in cardiac patients, the uterotonic of choice is **Oxytocin** (slow infusion), not ergometrine. * **B. Augmentation of labor with oxytocin:** This is acceptable if labor is slow. Oxytocin should be given in a concentrated form via an infusion pump to avoid fluid overload. * **C. Epidural analgesia:** This is highly beneficial in MS. It reduces pain-induced tachycardia and decreases preload (via sympathetic blockade), which helps prevent pulmonary congestion. ### **Clinical Pearls for NEET-PG** * **Most common cardiac lesion in pregnancy:** Mitral Stenosis (Rheumatic). * **Most critical period:** Immediately postpartum (due to autotransfusion from the involuting uterus and relief of IVC compression). * **Management of choice for PPH in MS:** Oxytocin (slow IV) or Misoprostol. Avoid Ergometrine and Carboprost (the latter increases pulmonary artery pressure). * **Position:** Labor in the **left lateral position** to optimize venous return and cardiac output.

Question 109: Hypertonic dysfunctional labor is generally characterized by:

A. Rapid cervical dilatation
B. Less pain in labor
C. Responds favorably to oxytocin stimulation
D. Needs adequate pain relief (Correct Answer)

Explanation: **Explanation:** **Hypertonic dysfunctional labor** (also known as primary dysfunctional labor or hypertonic uterine inertia) is a condition where uterine contractions are frequent and painful but lack coordination and efficiency. Instead of starting at the fundus and moving downward (fundal dominance), contractions often originate in the middle segment of the uterus, failing to produce effective cervical effacement or dilatation. **Why Option D is Correct:** In hypertonic labor, the resting tone of the uterus (tonus) is elevated. This leads to constant, severe pain that is out of proportion to the actual progress of labor. Because the patient is often exhausted and in significant distress, the primary management involves **adequate pain relief** (such as morphine or epidural analgesia) and rest. This often helps "reset" the uterine rhythm or allows the patient to transition into a normal labor pattern. **Why Other Options are Incorrect:** * **A. Rapid cervical dilatation:** This is incorrect because hypertonic contractions are **ineffective**. Despite the frequency of contractions, cervical dilatation is slow or arrested. * **B. Less pain in labor:** This is incorrect; hypertonic labor is characterized by **increased pain** due to uterine hypoxia and the lack of a relaxation phase between contractions. * **C. Responds favorably to oxytocin:** This is **contraindicated**. Oxytocin increases uterine tone and frequency, which would worsen the hypertonicity and potentially lead to fetal distress or uterine rupture. Oxytocin is used for *hypotonic* labor, not hypertonic. **Clinical Pearls for NEET-PG:** * **Hypertonic Labor:** High resting tone, very painful, occurs in the **latent phase**, managed with sedation/analgesia. * **Hypotonic Labor:** Low resting tone, less painful, occurs in the **active phase**, managed with oxytocin/ARM (Artificial Rupture of Membranes). * **Fetal Risk:** Hypertonic labor carries a high risk of **fetal distress** because the elevated resting tone reduces placental perfusion.

Question 110: A 25-year-old nulliparous woman at 35 weeks' gestation presents with contractions, headache, and visual disturbances. Her pregnancy has been uncomplicated. Her temperature is 37 C, blood pressure is 160/110 mm Hg, pulse is 88/minute, and respirations are 12/minute. Examination reveals a cervix that is 2 cm dilated and 75% effaced, with contractions occurring every 2 minutes. Fetal heart rate is in the 140s and reactive. Urinalysis shows 3+ proteinuria. Laboratory values: leukocytes 9,400/mm3, hematocrit 35%, platelets 101,000/mm3, AST 200 U/L, and ALT 300 U/L. What is the most appropriate next step in management?

A. Administer oxytocin
B. Discharge the patient
C. Encourage ambulation
D. Administer magnesium sulfate (Correct Answer)

Explanation: **Explanation:** The patient presents with **Preeclampsia with Severe Features**. This diagnosis is established by the presence of hypertension (BP ≥160/110 mmHg) and proteinuria at >20 weeks' gestation, accompanied by "severe features": neurological symptoms (headache, visual disturbances), thrombocytopenia, and significantly elevated liver enzymes (AST/ALT). **Why Magnesium Sulfate is the Correct Choice:** The primary goal in managing preeclampsia with severe features is the **prevention of eclamptic seizures**. Magnesium sulfate (MgSO₄) is the drug of choice for seizure prophylaxis. It is initiated immediately upon diagnosis, regardless of whether the patient is in labor, to stabilize the patient before and during delivery. **Analysis of Incorrect Options:** * **A. Administer oxytocin:** While delivery is the definitive cure for preeclampsia, the immediate priority is maternal stabilization (seizure prophylaxis and BP control). Oxytocin may be used later for induction, but MgSO₄ must be started first. * **B. Discharge the patient:** This is contraindicated. Preeclampsia with severe features requires hospitalization due to the high risk of maternal and fetal complications (e.g., stroke, placental abruption). * **C. Encourage ambulation:** Patients with severe preeclampsia should be on bed rest to minimize stimulation and monitor for worsening symptoms. **NEET-PG High-Yield Pearls:** * **Criteria for Severe Features:** BP ≥160/110, Platelets <100,000, Cr >1.1, elevated LFTs (2x normal), pulmonary edema, or new-onset cerebral/visual symptoms. * **MgSO₄ Dosing:** Loading dose of 4–6g IV followed by a maintenance dose of 1–2g/hr. * **Monitoring Toxicity:** Monitor patellar reflex, respiratory rate (>12/min), and urine output (>30ml/hr). The antidote for toxicity is **Calcium Gluconate (10%)**. * **Delivery Timing:** For preeclampsia with severe features, delivery is indicated at **34 weeks** or immediately if maternal/fetal status deteriorates.

Practice by Chapter

Physiology of Labor

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Stages of Labor and Normal Progression

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Fetal Monitoring Techniques

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Pain Management in Labor

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Induction and Augmentation of Labor

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Operative Delivery (Forceps and Vacuum)

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Cesarean Section: Indications and Techniques

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Dystocia and Abnormal Labor Patterns

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Obstetric Emergencies

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Postpartum Hemorrhage Management

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