Maternal-Fetal Medicine Practice Questions

Q: Caudal regression syndrome, a rare anomaly, is associated with which maternal complication during pregnancy?

Diabetes. **Explanation:** **Caudal Regression Syndrome (CRS)** is a rare congenital malformation characterized by varying degrees of developmental failure involving the lower spine (sacrum/lumbar vertebrae), spinal cord, and lower limbs. **1. Why Diabetes is the Correct Answer:** Maternal **Pre-gestational Diabetes Mellitus** (Type 1 or Type 2) is the most significant risk factor for CRS. While the most common cardiac anomaly in infants of diabetic mothers (IDM) is a Ventricular Septal Defect (VSD), **Caudal Regression Syndrome is the most specific malformation associated with maternal diabetes.** The risk is increased nearly 200-fold in diabetic pregnancies compared to the general population. The pathogenesis is linked to fetal oxidative stress and disturbed gene expression (like *Hox* genes) during the first trimester due to poor glycemic control. **2. Why Other Options are Incorrect:** * **Epilepsy:** While anti-epileptic drugs (like Valproate) are teratogenic, they are typically associated with Neural Tube Defects (NTDs) like spina bifida, not CRS. * **Hypertension:** Chronic hypertension is associated with fetal growth restriction (IUGR) and placental abruption, but it is not a primary teratogen for structural spinal anomalies. * **SLE:** Maternal SLE is classically associated with **Congenital Complete Heart Block** in the fetus due to the transplacental passage of anti-Ro (SSA) and anti-La (SSB) antibodies. **High-Yield Facts for NEET-PG:** * **Most common anomaly in IDM:** Congenital Heart Disease (specifically VSD). * **Most specific anomaly in IDM:** Caudal Regression Syndrome (Sacral Agenesis). * **Hypertrophic Cardiomyopathy:** Often seen in IDM; involves the interventricular septum and is usually transient. * **Neonatal Complications of IDM:** Hypoglycemia, Hypocalcemia, Hyperbilirubinemia, and Polycythemia.

Q: What is the most effective drug for the treatment of Intrauterine Growth Restriction (IUGR)?

None of the above. **Explanation:** The correct answer is **None of the above** because, currently, there is **no proven pharmacological treatment** to reverse or "cure" established Intrauterine Growth Restriction (IUGR). The management of IUGR focuses primarily on intensive fetal surveillance (Doppler studies, BPP) and timely delivery to prevent intrauterine fetal demise. **Why the other options are incorrect:** * **Aspirin:** Low-dose aspirin (75–150 mg) is highly effective for the **prevention** of placental insufficiency and preeclampsia if started before 16 weeks of gestation in high-risk patients. However, it has no therapeutic benefit once IUGR has already been diagnosed. * **Nitric Oxide (NO) Donors:** While NO is a potent vasodilator, clinical trials (like the use of Sildenafil or Glyceryl Trinitrate) have failed to show significant improvement in fetal growth outcomes or a reduction in perinatal mortality. * **Antioxidants:** Vitamins C and E were once hypothesized to reduce oxidative stress in the placenta, but large-scale studies have shown they do not improve birth weight and may even increase the risk of premature rupture of membranes. **NEET-PG High-Yield Pearls:** 1. **Prevention vs. Treatment:** Aspirin is for *prophylaxis*, not *treatment*. 2. **Definitive Management:** The only "cure" for IUGR is delivery, balanced against the risks of prematurity. 3. **Monitoring Gold Standard:** **Umbilical Artery Doppler** is the most important tool for monitoring IUGR; "Absent or Reversed End Diastolic Flow" (AREDF) is a critical indicator for urgent delivery. 4. **Steroids:** If delivery is planned before 34 weeks, corticosteroids (Betamethasone) must be given to accelerate fetal lung maturity.

Q: A 34-week pregnant patient presents with acute liver failure, coagulopathy, and intrauterine fetal demise. Her blood pressure is normal and viral markers are negative. What is the most probable diagnosis?

Acute fatty liver of pregnancy. **Explanation:** **Acute Fatty Liver of Pregnancy (AFLP)** is a rare but life-threatening emergency occurring in the third trimester. The hallmark of AFLP is **microvesicular steatosis** of hepatocytes, leading to rapid-onset hepatic failure. The clinical presentation in this case—acute liver failure (jaundice, encephalopathy), coagulopathy (DIC), and intrauterine fetal demise (IUFD) in the absence of hypertension—is classic for AFLP. While often associated with preeclampsia, 50% of patients may be normotensive. **Why other options are incorrect:** * **Intrahepatic Cholestasis of Pregnancy (ICP):** Presents with intense pruritus (palms and soles) and elevated bile acids. It does not cause liver failure or coagulopathy. * **Viral Hepatitis:** While the most common cause of jaundice in pregnancy, it is ruled out here by negative viral markers. * **Obstructive Jaundice:** Usually presents with colicky pain and an obstructive enzyme pattern (high ALP/GGT) without acute liver failure or DIC. **High-Yield Clinical Pearls for NEET-PG:** * **Swansea Criteria:** Used for diagnosing AFLP (requires $\geq$ 6 clinical/biochemical features). * **Biochemical Hallmarks:** Hypoglycemia (very characteristic), hyperuricemia, elevated ammonia, and prolonged PT/APTT. * **Genetic Link:** Strongly associated with a fetal deficiency of the enzyme **Long-Chain 3-Hydroxyacyl-CoA Dehydrogenase (LCHAD)**. * **Management:** Immediate stabilization and **urgent delivery**, regardless of gestational age. Liver function typically improves rapidly postpartum.

Q: Single umbilical artery is associated with all of the following except?

Advanced maternal age. **Explanation:** A **Single Umbilical Artery (SUA)**, or 2-vessel cord, occurs when one of the two umbilical arteries is absent (usually the left). It is the most common umbilical cord anomaly, occurring in approximately 1% of singleton pregnancies. **Why "Advanced Maternal Age" is the correct answer:** Unlike many chromosomal anomalies, the incidence of SUA is **not** significantly associated with advanced maternal age. Instead, it is more frequently associated with **young maternal age** (less than 20 years), maternal smoking, and primiparity. **Analysis of Incorrect Options:** * **Polyhydramnios:** SUA is frequently associated with maternal complications like polyhydramnios and pre-eclampsia. Polyhydramnios often occurs due to associated fetal structural anomalies (e.g., esophageal atresia) that interfere with fetal swallowing. * **Fetal Growth Retardation (FGR):** There is a strong correlation between SUA and FGR. Even in the absence of structural malformations, a single artery may lead to placental insufficiency, resulting in a higher incidence of small-for-gestational-age (SGA) infants. * **Increased incidence of fetal malformation:** Approximately 20–30% of fetuses with SUA have associated malformations. The most common involve the **cardiovascular system** (e.g., VSD) and the **genitourinary system** (e.g., renal agenesis). **High-Yield Clinical Pearls for NEET-PG:** * **Most common association:** Renal and Cardiac anomalies. * **Chromosomal link:** SUA is associated with Trisomy 18 (Edwards Syndrome) and Trisomy 13 (Patau Syndrome). * **Management:** If SUA is detected on a mid-trimester scan, a detailed **Targeted Imaging for Fetal Anomalies (TIFFA)** and a **Fetal Echocardiogram** are mandatory. * **Prognosis:** If the SUA is "isolated" (no other anomalies), the neonatal outcome is generally excellent, though serial growth scans are recommended.

Q: Which of the following is NOT a feature of pre-eclampsia?

Vomiting. **Explanation:** Pre-eclampsia is a multisystem disorder characterized by new-onset hypertension (BP ≥ 140/90 mmHg) and proteinuria (or end-organ dysfunction) after 20 weeks of gestation. **Why "Vomiting" is the correct answer:** While nausea and vomiting can occur in severe cases (often associated with HELLP syndrome), **vomiting is not a diagnostic feature or a specific "warning sign"** of pre-eclampsia. It is a non-specific symptom common in pregnancy. In contrast, the other options represent classic diagnostic criteria or "imminent signs" indicating severe pre-eclampsia. **Analysis of Incorrect Options:** * **Option A (BP > 140/90 mmHg):** This is the fundamental diagnostic threshold for gestational hypertension and pre-eclampsia when recorded on two occasions at least 4 hours apart after 20 weeks. * **Option B (Epigastric pain):** This is a "warning sign" of imminent eclampsia. It typically results from hepatic stretching (Glisson’s capsule tension) or subcapsular hematoma, often seen in HELLP syndrome. * **Option D (Visual disturbances and heartburn):** Visual disturbances (scotomata, blurring) indicate cortical irritability or retinal edema. Heartburn/retrosternal pain is often grouped with epigastric pain as a sign of hepatic involvement or severe gastric irritation in pre-eclampsia. **NEET-PG High-Yield Pearls:** 1. **New Definition:** Proteinuria is no longer mandatory for diagnosis if other end-organ dysfunctions (thrombocytopenia, renal insufficiency, impaired liver function, or cerebral symptoms) are present. 2. **Imminent Eclampsia Signs:** Headache (most common), visual disturbances, epigastric pain, and hyperreflexia. 3. **Drug of Choice:** Magnesium Sulfate ($MgSO_4$) is the drug of choice for both prophylaxis and control of convulsions in eclampsia (Pritchard Regimen). 4. **Definitive Treatment:** Delivery of the fetus and placenta.

Q: Polyhydramnios is typically most pronounced during which gestational period?

Third trimester. **Explanation:** Polyhydramnios is defined as an excessive accumulation of amniotic fluid (Amniotic Fluid Index >24 cm or Single Deepest Pocket >8 cm). The correct answer is the **Third Trimester** because amniotic fluid dynamics are volume-dependent on fetal physiological processes that peak late in pregnancy. **Why the Third Trimester is Correct:** Amniotic fluid volume increases progressively throughout pregnancy, reaching its peak (approximately 800–1000 mL) at **34–36 weeks**. From the second trimester onwards, fetal **urine production** becomes the primary source of amniotic fluid, while fetal **swallowing** is the main pathway for resorption. In cases of polyhydramnios (e.g., maternal diabetes, fetal GI atresia, or idiopathic causes), the imbalance between production and resorption becomes most clinically evident and voluminous during the third trimester as fetal urine output reaches its maximum (up to 700–1000 mL/day). **Why Other Options are Incorrect:** * **A & B (First/Early Second Trimester):** During early pregnancy, amniotic fluid is primarily an ultrafiltrate of maternal plasma or fetal serum across non-keratinized skin. The volumes are too small (approx. 30 mL at 10 weeks) for polyhydramnios to be "pronounced." * **C (Latter Second Trimester):** While fluid begins to increase rapidly here, it has not yet reached the physiological peak seen in the third trimester. **NEET-PG High-Yield Pearls:** * **Most common cause:** Idiopathic (approx. 50–60%), followed by Maternal Diabetes. * **Most common fetal anomaly:** Esophageal atresia (due to impaired swallowing). * **Clinical Sign:** "Fluid thrill" on abdominal examination and "Uterus larger than dates." * **Complications:** Preterm labor, Cord prolapse, and Postpartum hemorrhage (due to uterine atony).

Q: Life-threatening complications of recalcitrant Hyperemesis Gravidarum include all except:

Hyperprothrombinemia. **Explanation:** Hyperemesis Gravidarum (HG) is a severe form of nausea and vomiting in pregnancy that leads to dehydration, electrolyte imbalance, and nutritional deficiencies. **Why Option B is the Correct Answer:** The correct answer is **Hyperprothrombinemia** because HG actually causes the opposite: **Hypoprothrombinemia**. Severe vomiting leads to a deficiency of Vitamin K (a fat-soluble vitamin). Since Vitamin K is essential for the synthesis of clotting factors II, VII, IX, and X, its deficiency results in a prolonged Prothrombin Time (PT) and decreased prothrombin levels, potentially leading to coagulopathy. **Analysis of Incorrect Options:** * **A. Esophageal rupture:** Forceful, repeated vomiting can lead to linear mucosal lacerations at the gastroesophageal junction (**Mallory-Weiss tears**) or, more rarely, full-thickness esophageal rupture (**Boerhaave syndrome**). * **C. Thiamine deficiency:** This is a critical complication of recalcitrant HG. Severe depletion of Vitamin B1 (Thiamine) can lead to **Wernicke’s Encephalopathy**, characterized by the triad of ataxia, ophthalmoplegia, and confusion. * **D. Hyperalimentation complications:** Patients with recalcitrant HG often require parenteral nutrition (TPN). This carries risks such as catheter-related sepsis, air embolism, and metabolic derangements like **Refeeding Syndrome**. **High-Yield Clinical Pearls for NEET-PG:** * **Wernicke’s Encephalopathy:** Always give Thiamine supplementation *before* intravenous glucose in HG patients to prevent precipitating acute encephalopathy. * **Electrolyte Triad:** HG typically presents with **Hypokalemic, Hypochloremic, Metabolic Alkalosis**. * **Liver Function:** HG can cause a mild rise in serum transaminases (usually <300 U/L) and serum bilirubin. * **Thyroid:** HG is often associated with transient gestational hyperthyroidism due to high hCG levels (hCG mimics TSH).

Q: Which of the following conditions shows a "snowstorm appearance" on ultrasonography?

Hydatidiform mole. **Explanation:** The **"snowstorm appearance"** is the classic ultrasonographic hallmark of a **Hydatidiform Mole** (specifically a complete molar pregnancy). This appearance is caused by the presence of multiple small, hydropic (fluid-filled) chorionic villi that undergo cystic degeneration. On ultrasound, these vesicles appear as a complex pattern of numerous small, low-level echoes (hyperechoic areas) interspersed with tiny sonolucent (anechoic) spaces, resembling a snowstorm or "bunches of grapes." **Analysis of Options:** * **Hydatidiform Mole (Correct):** The absence of a fetus and the presence of a heterogeneous mass filling the uterine cavity with characteristic cystic spaces confirm this diagnosis. * **Tubal Pregnancy:** Typically presents as an adnexal mass (e.g., "blob sign" or "bagel sign") with an empty uterus. * **Abdominal Pregnancy:** Characterized by a fetus located outside the uterus, often with an empty uterine cavity and oligohydramnios. * **Fibroid:** Usually appears as a well-defined, hypoechoic, solid mass with whorled patterns and posterior acoustic shadowing. **High-Yield Clinical Pearls for NEET-PG:** * **Complete Mole:** 46 XX (most common), paternal origin, "snowstorm" appearance, no fetal parts, high risk of choriocarcinoma. * **Partial Mole:** 69 XXY (triploidy), fetal parts may be present, focal cystic changes in the placenta. * **Theca Lutein Cysts:** Often seen bilaterally in the ovaries due to extremely high levels of β-hCG associated with molar pregnancies. * **Clinical Triad:** Painless vaginal bleeding, uterus larger than gestational age, and hyperemesis gravidarum.

Q: Which of the following statements regarding twining is true?

After embryonic disc fusion, conjoint twin is formed.. **Explanation:** The timing of zygotic division determines the type of monozygotic (MZ) twinning. If division occurs **after the 13th day** of fertilization (when the embryonic disc has already begun to form), the separation is incomplete, resulting in **conjoint twins**. This is the underlying embryological basis for the correct option. **Analysis of Options:** * **Option A (Correct):** Incomplete division of the embryonic disc after day 13 leads to conjoint twins (e.g., thoracopagus, craniopagus). * **Option B & C (Incorrect):** The incidence of **monozygotic twins** is remarkably constant worldwide (approx. 1 in 250 births) and is independent of race, age, or parity. Conversely, the incidence of **dizygotic (DZ) twins** varies significantly based on race (highest in Nigerians, lowest in Japanese), maternal age, and the use of assisted reproductive technologies. * **Option D (Incorrect):** The frequencies are not the same. While MZ rates are constant, DZ rates fluctuate. According to **Hellin’s Rule**, the general frequency of twins is 1 in 80 pregnancies, but this refers to total twinning, not an equal split between zygosity types. **High-Yield Clinical Pearls for NEET-PG:** * **Timing of Division:** * 0–72 hours: Dichorionic Diamniotic (DCDA) * 4–8 days: Monochorionic Diamniotic (MCDA) — *Most common MZ type (75%)* * 8–13 days: Monochorionic Monoamniotic (MCMA) * >13 days: Conjoint twins * **Lambda (λ) Sign:** Seen in DCDA (thick membrane). * **T-sign:** Seen in MCDA (thin membrane). * **Most common variety of conjoint twins:** Thoracopagus (joined at the chest).

Question 1

Caudal regression syndrome, a rare anomaly, is associated with which maternal complication during pregnancy?

Accepted Answer

Diabetes

Answer

Epilepsy

Answer

Hypertension

Answer

Systemic Lupus Erythematosus (SLE)

Question 2

What is the most effective drug for the treatment of Intrauterine Growth Restriction (IUGR)?

Accepted Answer

None of the above

Answer

Aspirin

Answer

Nitric oxide donors

Answer

Antioxidants

Question 3

A 34-week pregnant patient presents with acute liver failure, coagulopathy, and intrauterine fetal demise. Her blood pressure is normal and viral markers are negative. What is the most probable diagnosis?

Accepted Answer

Acute fatty liver of pregnancy

Answer

Intrahepatic cholestasis of pregnancy

Answer

Viral hepatitis

Answer

Obstructive jaundice

Question 4

Single umbilical artery is associated with all of the following except?

Accepted Answer

Advanced maternal age

Answer

Polyhydramnios

Answer

Fetal growth retardation

Answer

Increased incidence of fetal malformation

Question 5

Which of the following is NOT a feature of pre-eclampsia?

Accepted Answer

Vomiting

Answer

Blood pressure > 140/90 mmHg after 20 weeks of gestation

Answer

Epigastric pain

Answer

Visual disturbances and heartburn

Question 6

Polyhydramnios is typically most pronounced during which gestational period?

Accepted Answer

Third trimester

Answer

End of the first trimester

Answer

Early part of the second trimester

Answer

Latter part of the second trimester

Question 7

Life-threatening complications of recalcitrant Hyperemesis Gravidarum include all except:

Accepted Answer

Hyperprothrombinemia

Answer

Esophageal rupture

Answer

Thiamine deficiency

Answer

Hyperalimentation complications

Question 8

Which of the following conditions shows a "snowstorm appearance" on ultrasonography?

Accepted Answer

Hydatidiform mole

Answer

Tubal pregnancy

Answer

Abdominal pregnancy

Answer

Fibroid

Question 9

Which of the following statements regarding twining is true?

Accepted Answer

After embryonic disc fusion, conjoint twin is formed.

Answer

Incidence of monozygotic twin varies with race.

Answer

Incidence of dizygotic twin is constant.

Answer

The frequency of monozygosity and dizygosity is the same.

Question 10

In a pregnant woman with heart disease, all of the following are to be done except?

Accepted Answer

Administer IV methergine after delivery

Answer

Provide prophylactic antibiotics

Answer

Administer IV frusemide postpartum

Answer

Shorten the second stage of labor

Maternal-Fetal Medicine — MCQs

Maternal-Fetal Medicine — MCQs

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