Maternal-Fetal Medicine Practice Questions

Q: A hemodynamically stable nulliparous patient with ectopic pregnancy has an adnexal mass of 2.5 x 3 cms and a Beta HCG titer of 1500 miu/ml. What modality of treatment is suitable for her?

Medical management. ### Explanation The management of ectopic pregnancy is determined by the patient's hemodynamic stability, the size of the adnexal mass, and Beta-HCG levels. **Why Medical Management is Correct:** This patient is a prime candidate for medical management with **Methotrexate** because she meets the standard inclusion criteria: 1. **Hemodynamic stability:** No signs of rupture or active bleeding. 2. **Size of adnexal mass:** The mass is $\leq$ 3.5 cm (this patient’s mass is 3 cm). 3. **Beta-HCG levels:** Titer is < 5000 mIU/ml (this patient’s titer is 1500 mIU/ml). 4. **Desire for fertility:** As a nulliparous patient, medical management avoids the surgical risks of tubal scarring. **Analysis of Incorrect Options:** * **A. Conservative (Expectant) Management:** This is generally reserved for patients with very low, spontaneously declining Beta-HCG levels (usually < 1000 mIU/ml) and no symptoms. A titer of 1500 mIU/ml requires active intervention. * **C. Laparoscopic Surgery:** This is the gold standard for **ruptured** ectopic pregnancies in stable patients or when medical management is contraindicated/fails. Since this patient is stable and meets medical criteria, surgery is unnecessarily invasive. * **D. Laparotomy:** Reserved for hemodynamically **unstable** patients (shock) with a ruptured ectopic pregnancy where immediate life-saving intervention is required. **High-Yield Clinical Pearls for NEET-PG:** * **Methotrexate Dose:** 50 mg/m² BSA (intramuscular). * **Contraindications to Medical Management:** Breastfeeding, immunodeficiency, active pulmonary/renal/hepatic disease, and the presence of **fetal cardiac activity** (relative contraindication). * **Monitoring:** Beta-HCG levels are measured on Day 4 and Day 7. A decline of $\geq$ 15% between Day 4 and Day 7 indicates successful treatment. * **Most common site of ectopic:** Ampulla (Fallopian tube). * **Most common site of rupture:** Isthmus (occurs earliest).

Q: What is the recommended concentration of MgSO4 in meq/L for the treatment of eclampsia?

4 7 meq/L. **Explanation:** Magnesium Sulfate ($MgSO_4$) is the drug of choice for both the prophylaxis and treatment of seizures in eclampsia. The therapeutic goal is to maintain a specific serum concentration that is high enough to prevent seizures but low enough to avoid systemic toxicity. **1. Why 4–7 mEq/L is correct:** The therapeutic window for $MgSO_4$ in eclampsia is **4–7 mEq/L** (equivalent to 4.8–8.4 mg/dL). At this concentration, magnesium acts as a CNS depressant and a vasodilator, effectively raising the seizure threshold without compromising vital functions. **2. Analysis of Incorrect Options:** * **2–4 mEq/L (Option C):** This is below the therapeutic range. While normal physiological magnesium levels are 1.5–2.5 mEq/L, concentrations in this range are insufficient to prevent eclamptic convulsions. * **7–10 mEq/L (Option A):** This range approaches the threshold of toxicity. Loss of patellar reflexes (knee jerk) typically occurs when levels exceed **7–10 mEq/L** (or >10 mg/dL). * **10–15 mEq/L (Option B):** This is a dangerously toxic range. Respiratory depression and narcosis generally occur at **12–15 mEq/L**, and cardiac arrest is imminent when levels exceed **25–30 mEq/L**. **High-Yield Clinical Pearls for NEET-PG:** * **Monitoring:** Always check for the presence of the **Patellar reflex**, Respiratory rate (>12-14/min), and Urine output (>30 ml/hr or 100 ml/4hrs) before administering repeat doses. * **Antidote:** If toxicity occurs, the immediate treatment is **10 ml of 10% Calcium Gluconate** IV, administered slowly over 10 minutes. * **Excretion:** Magnesium is almost exclusively excreted by the kidneys; hence, dose adjustment is mandatory in renal impairment.

Q: A 21-year-old female presents with 8 weeks of amenorrhea and is now in shock. What is the most likely diagnosis?

Ruptured ectopic pregnancy. **Explanation:** The clinical presentation of **amenorrhea (8 weeks)** followed by **sudden shock** in a woman of reproductive age is a classic medical emergency. **1. Why Ruptured Ectopic Pregnancy is Correct:** An ectopic pregnancy occurs when a fertilized ovum implants outside the uterine cavity, most commonly in the **ampulla** of the fallopian tube. As the embryo grows, it distends the tube, eventually leading to rupture (typically between 6–10 weeks). Rupture causes massive **intraperitoneal hemorrhage (hemoperitoneum)**, leading to hypovolemic shock (tachycardia, hypotension, and pallor). In NEET-PG, the triad of amenorrhea, abdominal pain, and vaginal bleeding/shock should always be considered a ruptured ectopic pregnancy until proven otherwise. **2. Why Other Options are Incorrect:** * **Incarcerated Amnion:** This is not a standard clinical term. An incarcerated gravid uterus (usually at 12–16 weeks) causes urinary retention, not sudden shock. * **Torsed Ovarian Cyst:** While this causes acute pelvic pain and potentially localized peritonitis, it rarely causes systemic shock unless it leads to secondary rupture and massive internal bleeding, which is far less common than ectopic rupture. * **Threatened Abortion:** This presents with vaginal bleeding and mild cramping while the cervix remains closed. It does not cause hemodynamic instability or shock. **Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Transvaginal Ultrasound (TVS) + Serum β-hCG. * **Picket Fence Temperature:** Often seen in ruptured ectopic due to blood irritating the peritoneum. * **Management of Shock:** Immediate resuscitation with IV fluids/blood followed by **emergency laparotomy** (Salpingectomy). Do not wait for an ultrasound if the patient is hemodynamically unstable. * **Arias-Stella Reaction:** A characteristic endometrial change seen in ectopic pregnancy (hypersecretory glands with pleomorphic nuclei).

Q: Which drug is given to reduce uterine contractions during preterm labor with the least side effects?

Progesterone. **Explanation:** The correct answer is **Progesterone**. In the context of preterm labor management, it is crucial to distinguish between **prevention** and **acute tocolysis**. **Why Progesterone is Correct:** Progesterone is primarily used for the **prevention** of preterm birth in high-risk women (e.g., those with a short cervix or prior history). It maintains "uterine quiescence" by inhibiting pro-inflammatory cytokines and decreasing oxytocin receptors. Among all drugs listed, it has the **least systemic side effect profile**, as it mimics a natural pregnancy hormone. While not used to stop active, advanced labor, it is the drug of choice for long-term reduction of uterine irritability with minimal maternal-fetal risks. **Analysis of Incorrect Options:** * **Ritodrine:** A Beta-2 agonist. It is notorious for severe side effects, including maternal tachycardia, pulmonary edema, and hyperglycemia. It is now rarely used due to these safety concerns. * **Nifedipine:** A Calcium Channel Blocker. While it is the **first-line agent for acute tocolysis** due to better efficacy and fewer side effects than Ritodrine, it can still cause maternal hypotension, flushing, and headaches. * **Magnesium Sulfate:** Primarily used for **fetal neuroprotection** (if <32 weeks) rather than as a primary tocolytic. It carries risks of respiratory depression and loss of deep tendon reflexes at toxic levels. **NEET-PG High-Yield Pearls:** * **Drug of Choice (DOC) for Acute Tocolysis:** Nifedipine. * **DOC for Fetal Neuroprotection:** Magnesium Sulfate. * **Progesterone Formulations:** Vaginal progesterone is preferred for "short cervix," while IM 17-OHP is used for a history of prior preterm birth. * **Tocolytic Contraindication:** Do not give tocolytics if there is evidence of chorioamnionitis or abruption.

Q: Which of the following is NOT true regarding the management of suspected myocardial infarction in pregnancy?

Immediate delivery is indicated.. **Explanation:** The management of acute myocardial infarction (MI) in pregnancy follows the same life-saving principles as in non-pregnant adults, with the primary goal being maternal stabilization. **Why Option A is the correct answer (False statement):** Immediate delivery is **not** indicated in the management of acute MI. In fact, delivery (whether vaginal or cesarean) during the acute phase of an MI is associated with extremely high maternal mortality due to the massive hemodynamic shifts (increased cardiac output and stroke volume) that occur during labor and the immediate postpartum period. The goal is to stabilize the mother medically and delay delivery for at least **2–3 weeks** after the MI, if possible, to allow the myocardium to heal. **Analysis of other options:** * **Option B:** Beta-blockers (e.g., Metoprolol) are standard of care to reduce myocardial oxygen demand and are generally safe in pregnancy, though fetal growth should be monitored. * **Option C:** Low-dose aspirin is indicated for its antiplatelet effects and is considered safe throughout pregnancy. * **Option D:** Cardiac Troponins (I and T) are highly specific and are **not** elevated by normal pregnancy or labor. They remain the gold standard for diagnosing MI in pregnant patients. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause:** While atherosclerosis is common, **Spontaneous Coronary Artery Dissection (SCAD)** is a uniquely frequent cause of MI in the peripartum period. * **Positioning:** Always manage the patient in the **left lateral decubitus** position to prevent aortocaval compression. * **Thrombolysis:** If PCI (Percutaneous Coronary Intervention) is unavailable, thrombolytics can be used as they do not cross the placenta, though the risk of maternal hemorrhage (e.g., placental abruption) is increased.

Q: What is a true statement about symmetrical IUGR compared to asymmetrical IUGR?

Worse prognosis. **Explanation:** Intrauterine Growth Restriction (IUGR) is classified into two types based on the timing of the insult and the fetal growth pattern. **1. Why Option A is Correct:** **Symmetrical IUGR** (Type I) occurs due to an early insult during the **hyperplastic phase** of cellular growth (e.g., chromosomal anomalies, early TORCH infections). This results in a global reduction in the number of cells in all organs. Because the damage occurs early and affects the total cell count of the brain and body equally, the fetus has a limited capacity for catch-up growth, leading to a **worse prognosis** and higher risk of long-term neurodevelopmental deficits compared to asymmetrical IUGR. **2. Why Other Options are Incorrect:** * **B. Late onset:** Symmetrical IUGR is typically **early-onset** (before 32 weeks). Late-onset growth restriction is characteristic of asymmetrical IUGR, usually caused by placental insufficiency. * **C. Brain sparing effect:** This is a hallmark of **Asymmetrical IUGR**. In response to hypoxia, blood is shunted to the brain, heart, and adrenals at the expense of the liver and limbs. In symmetrical IUGR, the brain is not spared; the head circumference is reduced proportionately with the body. * **D. More common:** Asymmetrical IUGR is more common, accounting for approximately **70-80%** of all IUGR cases. Symmetrical IUGR accounts for only 20-30%. **High-Yield Clinical Pearls for NEET-PG:** * **Ponderal Index:** Low in asymmetrical IUGR; normal in symmetrical IUGR. * **HC/AC Ratio:** Elevated in asymmetrical IUGR (Head > Abdomen); normal in symmetrical IUGR. * **Most sensitive parameter for IUGR:** Abdominal Circumference (AC), as it reflects depleted glycogen stores in the fetal liver. * **Commonest cause of Asymmetrical IUGR:** Maternal hypertension/Placental insufficiency.

Question 1

A hemodynamically stable nulliparous patient with ectopic pregnancy has an adnexal mass of 2.5 x 3 cms and a Beta HCG titer of 1500 miu/ml. What modality of treatment is suitable for her?

Accepted Answer

Medical management

Answer

Conservative management

Answer

Laparoscopic surgery

Answer

Laparotomy

Question 2

What is the recommended concentration of MgSO4 in meq/L for the treatment of eclampsia?

Accepted Answer

4 
 7 meq/L

Answer

7 
 10 meq/L

Answer

10 
 15 meq/L

Answer

2 
 4 meq/L

Question 3

Contraction stress test is used to detect which of the following fetal conditions?

Accepted Answer

Fetal hypoxia

Answer

Placenta previa

Answer

Hydramnios

Answer

Cord prolapse

Question 4

Embryo reduction of a multiple pregnancy is typically performed at which gestational age?

Accepted Answer

11-13 weeks

Answer

8-10 weeks

Answer

13-15 weeks

Answer

16-18 weeks

Question 5

A 21-year-old female presents with 8 weeks of amenorrhea and is now in shock. What is the most likely diagnosis?

Accepted Answer

Ruptured ectopic pregnancy

Answer

Incarcerated amnion

Answer

Torsed ovarian cyst

Answer

Threatened abortion

Question 6

Which drug is given to reduce uterine contractions during preterm labor with the least side effects?

Accepted Answer

Progesterone

Answer

Ritodrine

Answer

Nifedipine

Answer

Magnesium sulfate

Question 7

In pregnancy, what is the drug of choice for initial treatment of immune thrombocytopenic purpura?

Accepted Answer

Systemic corticosteroids

Answer

Azathioprine

Answer

Intravenous immunoglobulins

Answer

Laparoscopic splenectomy

Question 8

Which of the following is NOT true regarding the management of suspected myocardial infarction in pregnancy?

Accepted Answer

Immediate delivery is indicated.

Answer

The patient should be started on a beta-blocker.

Answer

Daily low-dose aspirin should be given to the patient.

Answer

Troponin levels are helpful in the diagnosis of MI in pregnancy.

Question 9

Which of the following statements about acute fatty liver of pregnancy is true?

Accepted Answer

It is the most common cause of acute liver failure during pregnancy.

Answer

It typically manifests in the early weeks of pregnancy.

Answer

Hepatic dysfunction persists postpartum.

Answer

Some patients develop transient diabetes mellitus in the postpartum period.

Question 10

What is a true statement about symmetrical IUGR compared to asymmetrical IUGR?

Accepted Answer

Worse prognosis

Answer

Late onset

Answer

Brain sparing effect

Answer

More common

Maternal-Fetal Medicine — MCQs

Maternal-Fetal Medicine — MCQs

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