Maternal-Fetal Medicine Practice Questions

Q: What is the primary benefit of using steroids in the treatment of HELLP syndrome?

Increase platelet count in severe thrombocytopenia.. **Explanation:** The primary clinical benefit of administering corticosteroids (such as Dexamethasone) in HELLP syndrome is the **transient increase in maternal platelet count**. While steroids do not cure the underlying pathophysiology of HELLP, they stabilize endothelial membranes and reduce the inflammatory response, which helps in elevating the platelet count. This is particularly crucial for patients with severe thrombocytopenia (<50,000/µL) to facilitate safer anesthesia (e.g., regional anesthesia) and reduce the risk of surgical site bleeding during delivery. **Analysis of Options:** * **Option A & B:** Large-scale randomized controlled trials (such as the COPE trial) and Cochrane reviews have demonstrated that steroids **do not** significantly reduce maternal mortality, the incidence of acute renal failure, or the need for blood transfusions. * **Option D:** While some studies show a slight improvement in laboratory parameters, the effect on liver enzyme recovery is inconsistent and not considered the "primary" clinical benefit compared to the stabilization of platelets for delivery management. **High-Yield NEET-PG Pearls:** * **Drug of Choice:** Dexamethasone (10 mg IV every 12 hours) is preferred over Betamethasone because it has a more potent effect on increasing platelet counts. * **Definitive Treatment:** The only definitive treatment for HELLP syndrome is **delivery** (usually after 34 weeks or if maternal/fetal condition deteriorates). * **Mississippi Classification:** Class 1 HELLP (Platelets ≤ 50,000/µL) is the most severe form and the primary indication for considering steroid therapy to "buy time" for delivery preparation. * **Postpartum:** Steroids may also be used postpartum to accelerate the recovery of platelet counts in refractory cases.

Q: A 24-week pregnant female has developed gestational diabetes. Which of the following congenital anomalies is MOST characteristic of diabetic pregnancy?

Caudal regression syndrome. **Explanation:** **Why Caudal Regression Syndrome is the Correct Answer:** While the most common congenital malformations in infants of diabetic mothers (IDM) are **cardiac defects** (specifically Ventricular Septal Defects), **Caudal Regression Syndrome** (Sacral Agenesis) is the **most characteristic** or specific anomaly. This condition involves the incomplete development of the lower spine and sacrum, often associated with lower limb deformities and bowel/bladder dysfunction. Its incidence is nearly 200 times higher in diabetic pregnancies compared to the general population, making it a pathognomonic marker for pre-gestational diabetes. **Analysis of Incorrect Options:** * **A. Multicystic kidneys:** While renal anomalies (like renal agenesis or hydronephrosis) can occur in IDM, they are not as specific or characteristic as caudal regression. * **B. Esophageal atresia:** Gastrointestinal anomalies are increased in diabetic pregnancies, but esophageal atresia is less frequently associated with diabetes than cardiac or skeletal defects. * **D. Duodenal atresia:** This is most classically associated with **Down Syndrome (Trisomy 21)**, not maternal diabetes. **High-Yield Clinical Pearls for NEET-PG:** * **Most Common Anomaly:** Cardiac defects (VSD is #1; Transposition of Great Arteries is also highly associated). * **Most Specific Anomaly:** Caudal Regression Syndrome. * **Critical Period:** These anomalies occur during **organogenesis** (first 8 weeks), meaning they are associated with pre-gestational diabetes or poorly controlled blood sugar at conception, rather than gestational diabetes developing in the second trimester. * **Neural Tube Defects:** There is a 10-fold increased risk of NTDs in diabetic pregnancies.

Q: What is the single most effective drug in eclampsia?

Magnesium sulphate. **Explanation:** **Magnesium sulphate ($MgSO_4$)** is the drug of choice for both the prevention and control of seizures in eclampsia. Its superiority was definitively established by the **Collaborative Eclampsia Trial**, which proved it is more effective than phenytoin or diazepam in preventing recurrent convulsions and reducing maternal mortality. **Mechanism of Action:** $MgSO_4$ acts as a central nervous system depressant and a vasodilator. It works primarily by blocking **NMDA receptors** in the brain, increasing the seizure threshold. It also causes cerebral vasodilation, which reverses the vasospasm associated with eclampsia. **Why other options are incorrect:** * **Dilantin (Phenytoin):** While an effective anti-epileptic for primary seizure disorders, it is significantly less effective than $MgSO_4$ in eclampsia and carries a higher risk of recurrent seizures. * **Phenobarbital:** This is a sedative-hypnotic. It causes significant maternal respiratory depression and neonatal depression (floppy baby syndrome) without addressing the underlying pathophysiology of eclampsia. * **Paraldehyde:** Now largely obsolete, it was used historically but is difficult to administer and lacks the specific neuroprotective benefits of Magnesium. **High-Yield Clinical Pearls for NEET-PG:** * **Regimen:** The **Pritchard Regimen** (IM) and **Zuspan Regimen** (IV) are the standard protocols. * **Therapeutic Range:** 4–7 mEq/L. * **Monitoring:** Always check for **Patellar reflex** (first to disappear), **Respiratory rate** (>12/min), and **Urine output** (>30 ml/hr) before each dose. * **Antidote:** 10 ml of 10% **Calcium Gluconate** IV (administered slowly).

Q: Smoking causes all of the following conditions except:

Preeclampsia. **Explanation:** The correct answer is **Preeclampsia**. This is a classic "paradoxical" high-yield fact in Obstetrics. While smoking is a major risk factor for almost all adverse pregnancy outcomes, multiple epidemiological studies have consistently shown that smoking is associated with a **decreased risk** of developing preeclampsia. **Why Preeclampsia is the correct answer:** The underlying mechanism is believed to be related to **carbon monoxide (CO)** and **nicotine**. Smoking stimulates the production of placental growth factor (PlGF) and inhibits the release of soluble fms-like tyrosine kinase-1 (sFlt-1), an anti-angiogenic protein that is elevated in preeclampsia. By lowering sFlt-1 levels, smoking theoretically maintains better angiogenic balance, reducing the incidence of hypertension in pregnancy. **Why the other options are incorrect:** * **Preterm Birth:** Smoking is a potent cause of spontaneous preterm labor and preterm pre-labor rupture of membranes (PPROM) due to increased oxidative stress and collagen degradation in the fetal membranes. * **Abruptio Placenta:** Smoking causes chronic placental hypoxemia and vascular necrosis of the decidua, significantly increasing the risk of placental abruption. * **Intrauterine Fetal Demise (IUFD):** Smoking leads to chronic fetal hypoxia and Intrauterine Growth Restriction (IUGR) due to high levels of carboxyhemoglobin, which reduces oxygen delivery to the fetus, increasing the risk of stillbirth. **NEET-PG High-Yield Pearls:** * **Smoking & Preeclampsia:** Risk is reduced by approximately 30-50% in smokers. * **Smoking & Placenta:** It is a major risk factor for both **Placenta Previa** and **Abruptio Placenta**. * **Teratogenicity:** Smoking is specifically linked to **Orofacial clefts** (Cleft lip/palate). * **Post-natal:** It is the most significant modifiable risk factor for **Sudden Infant Death Syndrome (SIDS)**.

Q: In a pregnant patient with rheumatic heart disease, failure does not occur if she has which of the following conditions?

Hypothyroidism. **Explanation:** The core physiological challenge in managing a pregnant patient with Rheumatic Heart Disease (RHD) is the **increase in cardiac output (CO)**. Pregnancy normally increases CO by 30–50% to meet metabolic demands. Heart failure occurs when the cardiac reserve is overwhelmed by additional hemodynamic stressors. **Why Hypothyroidism is the Correct Answer:** Hypothyroidism is characterized by a **decreased metabolic rate**, which leads to bradycardia and a reduction in stroke volume. This effectively **lowers the cardiac output** and reduces the workload on the heart. In a patient with RHD (especially Mitral Stenosis), a slower heart rate allows for better diastolic filling, thereby acting as a "protective" factor against the development of congestive heart failure. **Analysis of Incorrect Options:** * **Preeclamptic Toxemia (PET):** Causes hypertension, increased systemic vascular resistance (afterload), and fluid retention, all of which precipitate heart failure. * **Hyperthyroidism:** Increases the metabolic rate, causes tachycardia, and significantly raises cardiac output, often leading to "high-output" heart failure. * **Polyhydramnios:** The excessive amniotic fluid increases intra-abdominal pressure, restricts venous return, and can cause sudden shifts in blood volume, stressing the maternal heart. **NEET-PG High-Yield Pearls:** * **Most common RHD lesion in pregnancy:** Mitral Stenosis (MS). * **Most common cause of maternal death in RHD:** Congestive Heart Failure. * **Critical periods for failure:** 28–32 weeks (peak plasma volume), during labor (second stage), and immediately postpartum (autotransfusion from the uterus). * **Management:** Beta-blockers are preferred in MS to maintain a slow heart rate and prolong diastole.

Q: At what period does tuberculosis flare up most commonly in a pregnant patient?

Puerperium. **Explanation:** The correct answer is **D. Puerperium**. **Medical Concept:** The primary reason for the flare-up of Tuberculosis (TB) during the puerperium (the 6-week period following childbirth) is the **reversal of pregnancy-induced immunosuppression**. During pregnancy, the maternal immune system shifts toward a Th2-dominant state (humoral immunity) to prevent fetal rejection, which suppresses the Th1-mediated response (cell-mediated immunity) required to control *Mycobacterium tuberculosis*. Upon delivery, there is a rapid "immune rebound" or restoration of Th1 responses. This sudden shift can lead to an inflammatory response against latent or subclinical infections, similar to **Immune Reconstitution Inflammatory Syndrome (IRIS)** seen in HIV patients starting ART. Additionally, the physical stress of labor and the metabolic demands of lactation further predispose the mother to reactivation. **Analysis of Incorrect Options:** * **A, B, & C (Trimesters):** While TB can occur at any stage, the high levels of progesterone and corticosteroids during pregnancy actually exert a protective, anti-inflammatory effect that often keeps the infection dormant. Therefore, clinical worsening is less common during the antepartum period compared to the postpartum period. **NEET-PG Clinical Pearls:** * **Congenital TB:** Most commonly acquired via the **umbilical vein** (primary complex in the liver) or by aspiration of infected amniotic fluid. * **Treatment:** The WHO/RNTCP regimen for TB in pregnancy is the same as in non-pregnant adults (2HREZ + 4HRE). **Streptomycin** is the only first-line drug **contraindicated** due to its ototoxicity (8th cranial nerve damage) to the fetus. * **Breastfeeding:** It is **not contraindicated** if the mother is on Anti-Tubercular Therapy (ATT), provided the infant receives Isoniazid prophylaxis and the mother practices respiratory hygiene.

Question 1

What is the primary benefit of using steroids in the treatment of HELLP syndrome?

Accepted Answer

Increase platelet count in severe thrombocytopenia.

Answer

Decrease maternal mortality rate.

Answer

Decrease rate of acute renal failure.

Answer

Increase rate of recovery of liver enzymes.

Question 2

A 24-week pregnant female has developed gestational diabetes. Which of the following congenital anomalies is MOST characteristic of diabetic pregnancy?

Accepted Answer

Caudal regression syndrome

Answer

Multicystic kidneys

Answer

Esophageal atresia

Answer

Duodenal atresia

Question 3

A 30-year-old woman with gestational diabetes presents with true labor pains at 30 weeks of gestation. The woman is given glucocorticoid therapy. What is the purpose of prenatal steroid therapy?

Accepted Answer

To increase the lecithin/sphingomyelin ratio in the amniotic fluid

Answer

To increase blood flow to the fetal lungs

Answer

To increase fetal PO2

Answer

To shift the fetal oxyhemoglobin dissociation curve to the right

Question 4

A full-term primipara presents with antepartum hemorrhage. What is the next line of management?

Accepted Answer

Examination in the operating room followed by amniotomy

Answer

Pelvic examination

Answer

Conservative management until the onset of labor

Answer

Lower segment cesarean section

Question 5

What is the single most effective drug in eclampsia?

Accepted Answer

Magnesium sulphate

Answer

Dilantin

Answer

Phenobarbital

Answer

Paraldehyde

Question 6

What is the recommended management for intrauterine fetal death at 36 weeks gestation?

Accepted Answer

Await spontaneous expulsion

Answer

Continue pregnancy until term

Answer

Administer Syntocinon and artificial rupture of membranes (ARM)

Answer

Perform hysterectomy

Question 7

One of the parents has a balanced translocation between chromosome 15 and 21. What advice will you provide to the couple to prevent a child being born with Down syndrome?

Accepted Answer

Prenatal diagnosis and abortion

Answer

Artificial insemination with donor's sperm

Answer

Adoption

Answer

No need to worry as there is no increased risk

Question 8

Smoking causes all of the following conditions except:

Accepted Answer

Preeclampsia

Answer

Preterm birth

Answer

Abruptio placenta

Answer

Intrauterine fetal demise

Question 9

In a pregnant patient with rheumatic heart disease, failure does not occur if she has which of the following conditions?

Accepted Answer

Hypothyroidism

Answer

Preeclamptic toxemia

Answer

Hyperthyroidism

Answer

Polyhydramnios

Question 10

At what period does tuberculosis flare up most commonly in a pregnant patient?

Accepted Answer

Puerperium

Answer

First trimester

Answer

Second trimester

Answer

Third trimester

Maternal-Fetal Medicine — MCQs

Maternal-Fetal Medicine — MCQs

On this page

Practice by Chapter

Want unlimited practice?