Labor and Delivery Practice Questions

Q: Which of the following drugs should not be used in the conduct of labour in a woman with rheumatic heart disease?

Methylergometrine. **Explanation:** In patients with Rheumatic Heart Disease (RHD), particularly those with Mitral Stenosis, the management of the third stage of labor is critical. The primary goal is to prevent sudden changes in hemodynamics and fluid overload. **Why Methylergometrine is contraindicated:** Methylergometrine (Methergine) is a potent vasoconstrictor. It causes **systemic vasoconstriction** and a sudden shift of blood from the peripheral circulation to the central compartment (autotransfusion). In a woman with RHD, this sudden increase in venous return (preload) can lead to acute pulmonary edema and heart failure. Additionally, it can cause a sharp rise in blood pressure. **Evaluation of other options:** * **Oxytocin (Option C):** This is the drug of choice for preventing Postpartum Hemorrhage (PPH) in cardiac patients. However, it must be administered as a **slow intravenous infusion**, never as a bolus, to avoid sudden hypotension. * **Carboprost (Option B):** While it can increase pulmonary artery pressure, it is not absolutely contraindicated like Methylergometrine; however, it is used with caution. * **Misoprostol (Option D):** This prostaglandin E1 analogue is safe for use in cardiac patients as it does not have significant effects on the cardiovascular system or vascular tone. **High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice for PPH in RHD:** Oxytocin (slow IV drip). * **Drug of Choice for PPH in Asthma:** Oxytocin or Misoprostol (Avoid Carboprost/PGF2α). * **Drug of Choice for PPH in Hypertension/Preeclampsia:** Oxytocin (Avoid Methylergometrine). * **Management Tip:** In RHD patients, the second stage of labor is often shortened by using forceps or vacuum to prevent maternal exhaustion and tachycardia.

Q: Normal laborogram includes all of the following EXCEPT?

Cervical dilatation in X-axis. In a **Partogram (Laborogram)**, the graphical representation of labor progress follows specific conventions. The correct answer is **A** because it incorrectly describes the axes. ### Why Option A is the Correct Answer (The Error) In a partogram, **Time** is always plotted on the **X-axis** (horizontal), while **Cervical Dilatation** (in cm) and **Descent of Fetal Head** (in stations/fifths) are plotted on the **Y-axis** (vertical). Reversing these axes would make the graph clinically unreadable. ### Analysis of Other Options * **B. Descent of head in Y-axis:** This is correct. Both cervical dilatation and fetal descent are measured against time on the vertical axis. * **C. Sigmoid shaped curve:** This refers to **Friedman’s Curve**. The active phase of labor typically follows a sigmoid (S-shaped) pattern, consisting of the latent phase, acceleration phase, phase of maximum slope, and deceleration phase. * **D. Alert line followed 4 hours later by action line:** This is a standard feature of the **WHO Partograph**. The Alert line starts at 4 cm dilatation; the Action line is drawn 4 hours to the right of and parallel to the alert line. If the labor curve crosses the action line, it indicates the need for intervention (e.g., augmentation or C-section). ### High-Yield Clinical Pearls for NEET-PG * **Latent Phase:** Usually lasts <20 hours in primigravida and <14 hours in multigravida. * **Active Phase:** Starts at **4 cm** (WHO) or **6 cm** (recent ACOG guidelines) dilatation. * **Rate of Dilatation:** In the active phase, the minimum expected rate is **1.2 cm/hr** for primigravida and **1.5 cm/hr** for multipara. * **Purpose:** The partogram is the best tool for the early identification of **prolonged or obstructed labor**, reducing maternal and neonatal morbidity.

Q: Which of the following is not a parameter in Bishop's score?

Position of head. The **Bishop Score** (also known as the Pelvic Score) is a clinical tool used to predict the likelihood of a successful vaginal delivery following the induction of labor. It assesses the "ripeness" of the cervix based on five specific physical parameters. ### Why "Position of Head" is the Correct Answer The Bishop score evaluates the **Position of the Cervix** (Posterior, Mid-position, or Anterior), not the position of the fetal head (such as Occipito-Anterior or Occipito-Posterior). While the *station* of the head is included, its rotational position is not a component of this scoring system. ### Analysis of Incorrect Options * **A. Cervical consistency:** This is a core parameter. It is graded as Firm (0), Medium (1), or Soft (2). A softer cervix is more favorable for induction. * **B. Station of head:** This measures the descent of the fetal presenting part relative to the ischial spines. It is scored from -3 (0 points) to +1/+2 (3 points). * **D. Cervical length (Effacement):** This measures the thinning of the cervix. It can be recorded as length in centimeters (0, 1-2, >2) or as a percentage of effacement. ### High-Yield Clinical Pearls for NEET-PG * **Mnemonic to remember parameters:** **"S-P-A-C-E"** (Station, Position of cervix, Apposition/Consistency, Cervical Effacement, Effacement/Dilatation). * **Interpretation:** * **Score ≥ 8:** Indicates a "ripe" cervix; the probability of a successful vaginal delivery is similar to that of spontaneous labor. * **Score ≤ 6:** Indicates an "unripe" cervix; cervical ripening agents (like PGE2/Dinoprostone) are typically required before induction. * **Modified Bishop Score:** In some clinical settings, cervical length (cm) is used instead of effacement percentage.

Q: Which drug inhibits uterine contractility and can cause pulmonary edema?

Ritodrine. **Explanation:** **Ritodrine** is a **Beta-2 adrenergic agonist** used as a tocolytic to inhibit uterine contractions in preterm labor. It works by increasing intracellular cAMP, which leads to smooth muscle relaxation. However, its activation of beta receptors is not purely selective. The most serious side effect of beta-mimetics like Ritodrine and Terbutaline is **pulmonary edema**. This occurs due to a combination of fluid overload (increased ADH secretion and sodium/water retention), increased capillary permeability, and tachycardia-induced left ventricular dysfunction. **Analysis of Incorrect Options:** * **B. Nifedipine:** A Calcium Channel Blocker (CCB). While it is currently the first-line tocolytic due to its safety profile, its primary side effects are hypotension, flushing, and headache, not pulmonary edema. * **C. Indomethacin:** A Prostaglandin synthetase inhibitor (NSAID). It is associated with fetal side effects such as premature closure of the ductus arteriosus and oligohydramnios. * **D. Atosiban:** An Oxytocin receptor antagonist. It is highly specific to the uterus and has the fewest maternal side effects among all tocolytics. **High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice (DOC):** Nifedipine is generally the first-line tocolytic for preterm labor (32–34 weeks). * **Contraindication:** Beta-mimetics (Ritodrine) are strictly contraindicated in women with cardiac disease or uncontrolled hyperthyroidism. * **Monitoring:** When using Ritodrine, clinicians must monitor maternal heart rate, lung sounds, and blood glucose levels (as it can cause hyperglycemia and hypokalemia).

Q: Which of the following is a common cause for transverse lie?

Placenta previa. **Explanation:** In a **transverse lie**, the long axis of the fetus is perpendicular to the long axis of the mother. This occurs when something prevents the fetal head or breech from engaging in the lower uterine segment. **Why Placenta Previa is Correct:** Placenta previa is a classic cause of transverse lie. When the placenta occupies the lower uterine segment, it physically obstructs the pelvic inlet. This prevents the fetal head from descending into the pelvis, forcing the fetus to assume a transverse or oblique position to accommodate the available space in the upper uterus. **Analysis of Incorrect Options:** * **Prolonged labor:** This is typically a *consequence* of a transverse lie (due to non-engagement and potential shoulder impaction), not a cause. * **Nulliparity:** In nulliparous women, the abdominal and uterine walls are usually tight, which helps maintain a longitudinal lie. **Grand multiparity** is actually the risk factor, as a lax abdominal wall allows the uterus to sag forward, shifting the fetal axis. * **Oligohydramnios:** Low amniotic fluid restricts fetal movement, often "locking" the fetus into whatever position it is already in (frequently breech). **Polyhydramnios** is the risk factor for transverse lie, as the excess fluid allows the fetus to move freely and fail to engage. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause:** Prematurity is the most frequent association. * **Multiparity:** The most common maternal factor (due to laxity). * **Clinical Sign:** On abdominal examination, the fundal height is often less than the period of gestation, and the fundus feels "empty." * **Management:** If transverse lie persists at term (37+ weeks), a **Cesarean section** is the safest mode of delivery. Internal podalic version is now largely obsolete except in the delivery of a second twin.

Q: A 28-year-old female, nearing her delivery date, has been admitted following regular contractions. The resident doctor examined her and documented that the fetal head is at +1 station. Where is the exact position of the head?

Just below the ischial spines. ### Explanation The concept of **Station** refers to the relationship between the leading bony part of the fetal presenting part and an imaginary line drawn between the maternal **ischial spines**. 1. **Why Option C is Correct:** The ischial spines are the narrowest part of the pelvic canal and serve as the landmark for **Station 0**. * Stations are measured in centimeters. * **Negative numbers (-1 to -5)** indicate the head is above the ischial spines. * **Positive numbers (+1 to +5)** indicate the head has descended below the ischial spines. Therefore, a **+1 station** means the fetal head is exactly **1 cm below** the level of the ischial spines. 2. **Analysis of Incorrect Options:** * **Option A (High up in the false pelvis):** This would correspond to a highly "floating" head, usually designated as Station -4 or -5. * **Option B (Just above the ischial spines):** This describes a negative station (e.g., -1 station). * **Option D (At the perineum):** This occurs when the head is at the pelvic outlet, typically corresponding to Station +4 or +5 (crowning). ### High-Yield Clinical Pearls for NEET-PG: * **Engagement:** When the widest diameter of the presenting part (biparietal diameter) passes through the pelvic inlet, the station is usually **0** (at the level of ischial spines). * **De Lee Scale:** The traditional system uses -5 to +5 centimeters. * **Internal Rotation:** This crucial movement of labor typically occurs when the fetus reaches the level of the ischial spines (Station 0) because this is where the pelvic floor muscles (levator ani) provide resistance. * **Clinical Significance:** If the station remains high despite good contractions, it may indicate **Cephalopelvic Disproportion (CPD)**.

Q: What is the minimum height for a primigravida woman to be considered for intervention regarding fetal growth?

140 cm. **Explanation:** In obstetrics, maternal height is a critical screening tool used to predict the risk of **Cephalopelvic Disproportion (CPD)**. A short stature is often associated with a small or contracted pelvis, which can lead to obstructed labor, especially in a primigravida where the pelvis has not been "proven" by a previous delivery. 1. **Why 140 cm is correct:** According to standard obstetric guidelines (including WHO and Park’s Preventive and Social Medicine), a height of **less than 140–145 cm** is considered a high-risk factor. Specifically, for NEET-PG purposes, **140 cm** is the established threshold below which a primigravida is categorized as "short-statured," necessitating close monitoring for fetal growth and pelvic adequacy to prevent complications like obstructed labor. 2. **Why other options are incorrect:** * **145 cm:** While some guidelines use 145 cm as a cautionary cutoff, 140 cm is the more definitive "minimum" threshold used in most standardized Indian medical examinations to trigger intervention or high-risk classification. * **150 cm:** This is considered a normal height; women of this height generally have a lower risk of contracted pelvis. * **135 cm:** While a woman of this height is certainly at risk, the screening threshold starts higher (at 140 cm) to ensure early identification of at-risk mothers. **High-Yield Clinical Pearls for NEET-PG:** * **Contracted Pelvis:** Defined when any of the essential diameters of the pelvis is reduced by 0.5 cm or more. * **CPD Assessment:** The best clinical method to assess CPD is **Muller-Munro Kerr’s method** (bimanual examination). * **Complications of Short Stature:** Increased risk of non-engagement of the fetal head, malpresentations (e.g., transverse lie), and prolonged labor. * **Management:** Short-statured primigravidae should ideally deliver in a tertiary care center where facilities for an emergency Cesarean section are available.

Q: Identify the option with the least risk of TOLAC (trial of labor after cesarean)?

Low-segment transverse incision. ***Low-segment transverse incision*** - This type of uterine incision is preferred during a Cesarean section as it is made in the least active segment, carrying the **lowest risk** of **uterine rupture** (approximately 0.5% to 0.9%) during a subsequent trial of labor. - It is generally considered the standard requirement for safely proceeding with a **VBAC** (Vaginal Birth After Cesarean) attempt. *Classical C section* - A **classical C-section** involves a vertical incision in the contractile upper segment (**uterine fundus**), which has the highest risk of **uterine rupture** (4% to 9%) during labor. - A history of a classical incision is generally considered an absolute **contraindication** to TOLAC. *Pre-eclampsia* - The presence of **pre-eclampsia** increases the risk of adverse outcomes to both mother and fetus, such as **placental abruption** and **intrauterine growth restriction**. - While not an absolute contraindication, it complicates management and often necessitates induction or delivery, placing it at a higher risk level compared to an uncomplicated TOLAC attempt. *Breech presentation* - **Breech presentation** is itself a risk factor for difficult vaginal delivery in nulliparous women, and combining it with a prior Cesarean scar (TOLAC) elevates the overall obstetric risk. - Many practitioners consider **breech presentation** in the current pregnancy a relative contraindication to TOLAC, favoring a planned repeat Cesarean delivery due to increased risk of complications.

Question 1

Which of the following drugs should not be used in the conduct of labour in a woman with rheumatic heart disease?

Accepted Answer

Methylergometrine

Answer

Carboprost

Answer

Oxytocin

Answer

Misoprostol

Question 2

Placenta accreta is associated with all except:

Accepted Answer

Uterine malformation

Answer

Placenta previa

Answer

Uterine scar

Answer

Multiparity

Question 3

Normal laborogram includes all of the following EXCEPT?

Accepted Answer

Cervical dilatation in X-axis

Answer

Descent of head in Y-axis

Answer

Sigmoid shaped curve

Answer

Ale line followed 4 hours later by action line

Question 4

Which of the following is not a parameter in Bishop's score?

Accepted Answer

Position of head

Answer

Cervical consistency

Answer

Station of head

Answer

Cervical length

Question 5

Which of the following is a definite sign of the onset of labor?

Accepted Answer

Formation of bag of waters

Answer

Labor pains

Answer

Show

Answer

Dilatation of internal os

Question 6

Which drug inhibits uterine contractility and can cause pulmonary edema?

Accepted Answer

Ritodrine

Answer

Nifedipine

Answer

Indomethacin

Answer

Atosiban

Question 7

Which of the following is a common cause for transverse lie?

Accepted Answer

Placenta previa

Answer

Prolonged labor

Answer

Nulliparity

Answer

Oligohydramnios

Question 8

A 28-year-old female, nearing her delivery date, has been admitted following regular contractions. The resident doctor examined her and documented that the fetal head is at +1 station. Where is the exact position of the head?

Accepted Answer

Just below the ischial spines

Answer

High up in the false pelvis

Answer

Just above the ischial spines

Answer

At the perineum

Question 9

What is the minimum height for a primigravida woman to be considered for intervention regarding fetal growth?

Accepted Answer

140 cm

Answer

145 cm

Answer

150 cm

Answer

135 cm

Question 10

Identify the option with the least risk of TOLAC (trial of labor after cesarean)?

Accepted Answer

Low-segment transverse incision

Answer

Breech presentation

Answer

Pre-eclampsia

Answer

Classical C section

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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