Pregnancy Medicine — MCQs

Pregnancy Medicine UK Medical PG Practice Questions and MCQs

Question 21: A 44-year-old woman presents with recurrent miscarriages and a history of DVT. Blood tests show prolonged APTT, positive lupus anticoagulant, and anticardiolipin antibodies. What is the most appropriate treatment for future pregnancies?

A. Aspirin alone
B. Warfarin
C. Aspirin plus low molecular weight heparin (Correct Answer)
D. Prednisolone
E. Immunoglobulin

Explanation: ***Aspirin plus low molecular weight heparin*** - This combination is the standard of care for pregnant women with **Antiphospholipid Syndrome (APS)**, particularly those with a history of both thrombotic events (DVT) and recurrent miscarriages. - **Aspirin** helps prevent placental microthrombi, while **low molecular weight heparin (LMWH)** provides systemic anticoagulation to prevent DVT and improve live birth rates. *Aspirin alone* - While aspirin is a component of the treatment, **aspirin alone** is generally insufficient for women with a history of both DVT and recurrent miscarriages due to APS. - It does not adequately address the increased risk of **macrothrombosis** (like DVT) associated with APS in pregnancy. *Warfarin* - **Warfarin** is a **teratogen** and is contraindicated during most of pregnancy (especially the first trimester and near term) due to the risk of fetal warfarin syndrome and bleeding complications. - Although an effective anticoagulant, its risks far outweigh benefits for pregnancy management of APS compared to heparin. *Prednisolone* - **Prednisolone** (a corticosteroid) is not a primary treatment for preventing thrombosis or improving pregnancy outcomes in Antiphospholipid Syndrome. - It does not directly address the underlying **prothrombotic state** that leads to DVT and miscarriages in APS. *Immunoglobulin* - **Intravenous immunoglobulin (IVIG)** is not a standard or evidence-based treatment for preventing thrombosis or recurrent miscarriage in women with Antiphospholipid Syndrome. - Its use is generally limited to specific, refractory autoimmune conditions and is not indicated as a first-line therapy for APS in pregnancy.

Question 22: A 29-year-old woman at 20 weeks gestation presents with fever, dysuria, and right loin pain. Urine culture grows E. coli resistant to amoxicillin but sensitive to cephalexin. What is the most appropriate treatment?

A. Amoxicillin
B. Cephalexin (Correct Answer)
C. Trimethoprim
D. Ciprofloxacin
E. Nitrofurantoin

Explanation: ***Cephalexin***- This **first-generation cephalosporin** is Pregnancy **Category B**, confirming its safety profile for use in the second trimester (20 weeks gestation).- The culture report explicitly indicates that the causative organism, *E. coli*, is **sensitive** to cephalexin, ensuring appropriate and targeted antibiotic coverage for the confirmed clinical diagnosis of acute pyelonephritis.*Amoxicillin*- The urine culture results clearly demonstrate that the *E. coli* isolate is **resistant** to amoxicillin, making this agent ineffective for treating the current infection.- Using a resistant antibiotic would result in **clinical failure**, allowing the **pyelonephritis** to progress and potentially harming both mother and fetus.*Trimethoprim*- Trimethoprim is a **folate antagonist** and is generally avoided throughout pregnancy, particularly in the first trimester, due to risks of **neural tube defects**.- Furthermore, current guidelines often favor cephalosporins or penicillins over trimethoprim for treating upper UTIs in pregnant women.*Ciprofloxacin*- **Fluoroquinolones** like ciprofloxacin are generally **contraindicated** in pregnancy (Category C/D) due to concerns regarding potential **fetal cartilage toxicity** and arthropathy.- Due to its safety profile, it should only be considered if no other effective and safer alternatives are available, which is not the case here.*Nitrofurantoin*- Nitrofurantoin is highly effective for lower UTIs (**cystitis**) but reaches inadequate therapeutic levels in the renal parenchyma, making it **ineffective** for treating **pyelonephritis** (upper UTI).- While safe in the second trimester, its poor tissue penetration excludes it as a primary treatment for upper urinary tract infections.

Question 23: A 39-year-old pregnant woman at 34 weeks gestation presents with severe headache, visual disturbances, and RUQ pain. BP is 170/110 mmHg. Blood tests show AST 180 U/L and platelets 75,000/μL. What is the most likely diagnosis?

A. Pre-eclampsia
B. HELLP syndrome (Correct Answer)
C. Acute fatty liver of pregnancy
D. Viral hepatitis
E. Cholestasis of pregnancy

Explanation: ***HELLP syndrome*** - The patient's presentation with severe headache, visual disturbances, RUQ pain, **hypertension (BP 170/110 mmHg)**, **elevated liver enzymes (AST 180 U/L)**, and **thrombocytopenia (platelets 75,000/μL)** are the classic diagnostic features of **HELLP syndrome**. - **HELLP syndrome** is a severe variant of pre-eclampsia, characterized by **Hemolysis**, **Elevated Liver enzymes**, and **Low Platelets**, typically manifesting in the third trimester. *Pre-eclampsia* - While the patient exhibits **hypertension** and symptoms like headache and visual disturbances consistent with pre-eclampsia, the degree of **elevated liver enzymes** and **severe thrombocytopenia** are more indicative of the HELLP variant. - Pre-eclampsia is defined by new-onset hypertension and proteinuria or signs of end-organ damage; however, the specific laboratory abnormalities here point to a more severe, distinct syndrome. *Acute fatty liver of pregnancy* - This condition presents with some overlapping symptoms like RUQ pain and elevated liver enzymes, but it typically involves more severe **liver failure**, often with **hypoglycemia**, **coagulopathy**, and **jaundice**, which are not prominently mentioned here. - Thrombocytopenia can occur but is usually less severe than in HELLP, and significant hypertension is not a primary diagnostic criterion for acute fatty liver of pregnancy. *Viral hepatitis* - **Viral hepatitis** would cause elevated liver enzymes and potentially RUQ pain, but it is less commonly associated with **severe hypertension** and **marked thrombocytopenia** as primary features in pregnancy-related presentations. - Diagnosis requires specific viral serology, and the overall clinical picture, especially the severe hypertension and thrombocytopenia, points away from viral hepatitis as the primary diagnosis. *Cholestasis of pregnancy* - This condition is primarily characterized by **severe generalized pruritus** (itching), often worse on the palms and soles, with elevated **bile acids**, and typically without a rash. - It does not typically present with **hypertension**, **headache**, **visual disturbances**, or significant **thrombocytopenia**, making it an unlikely diagnosis in this scenario.

Question 24: A 39-year-old woman at 32 weeks gestation presents with severe hypertension (BP 180/120 mmHg), proteinuria, and visual disturbances. Fetal monitoring shows signs of compromise. What is the most appropriate management?

A. Antihypertensive therapy and continue pregnancy
B. Magnesium sulfate and monitor
C. Immediate cesarean delivery (Correct Answer)
D. Corticosteroids for fetal lung maturity
E. Induction of labor

Explanation: ***Immediate cesarean delivery*** - This patient presents with **severe preeclampsia** (BP 180/120 mmHg, proteinuria, visual disturbances) and crucial signs of **fetal compromise** at 32 weeks gestation. Immediate delivery is the definitive treatment for severe preeclampsia, especially with maternal or fetal jeopardy. - Given the urgency due to **severe maternal hypertension** and **fetal compromise**, **cesarean delivery** is the quickest and safest method to deliver the baby, resolve the preeclampsia, and mitigate further risks to both mother and fetus. *Antihypertensive therapy and continue pregnancy* - Continuing the pregnancy is contraindicated due to the presence of **severe preeclampsia** with significant maternal symptoms and evidence of **fetal compromise**, which demand immediate intervention. - While **antihypertensive therapy** is necessary to manage blood pressure acutely, it only treats symptoms and does not address the underlying pathology or the immediate threat that necessitates delivery. *Magnesium sulfate and monitor* - **Magnesium sulfate** is essential for **seizure prophylaxis** in severe preeclampsia, but it is not the definitive treatment for the underlying condition or a substitute for delivery. - Merely monitoring the patient without immediate delivery in the face of **severe preeclampsia** and **fetal compromise** places both the mother (risk of **eclampsia**, stroke) and the fetus (risk of **stillbirth**) at unacceptable risk. *Corticosteroids for fetal lung maturity* - **Corticosteroids** (e.g., **betamethasone**) are administered to promote **fetal lung maturity** and reduce neonatal respiratory distress syndrome, typically between 24 and 34 weeks of gestation. - However, corticosteroids require 24-48 hours for optimal effect. In cases of **severe maternal or fetal jeopardy** demanding immediate delivery, waiting for steroid completion is not feasible. *Induction of labor* - **Induction of labor** may be considered in some preeclampsia cases, but it can be a prolonged process and its success depends on cervical favorability. - With severe features and **fetal compromise** requiring rapid resolution of the pregnancy, a **cesarean section** is generally preferred over induction to ensure a quicker and safer delivery.

Question 25: A 29-year-old woman at 20 weeks gestation presents with fever, flank pain, and dysuria. Urine culture grows E. coli resistant to amoxicillin but sensitive to cephalexin. What is the most appropriate treatment?

A. Amoxicillin
B. Cephalexin (Correct Answer)
C. Setraline

Explanation: ***Cephalexin*** - **Cephalexin**, a first-generation cephalosporin (Pregnancy Category B), is a suitable and safe choice for treating **pyelonephritis** in pregnant patients. - The urine culture confirms that the *E. coli* strain is **sensitive** to cephalexin, ensuring effective eradication of the infection. *Amoxicillin* - This antibiotic is inappropriate because the urine culture explicitly shows the *E. coli* causing the infection is **resistant** to **amoxicillin**. - Administering a resistant antibiotic would lead to treatment failure and potential worsening of the maternal and fetal condition, especially with pyelonephritis. *Setraline* - **Setraline (Sertraline)** is a selective serotonin reuptake inhibitor (SSRI), used for psychiatric conditions like depression or anxiety. - It has no therapeutic role in treating a bacterial infection such as **pyelonephritis**, which requires specific **antibiotic therapy**.

Question 26: A 36-year-old woman presents with fatigue, joint pain, and photosensitive rash. Blood tests show positive ANA, anti-Sm antibodies, and low complement levels. She is planning pregnancy. What is the most concerning antibody for fetal complications?

A. Anti-Sm
B. Anti-dsDNA
C. Anti-Ro/SSA (Correct Answer)
D. Anti-RNP
E. Anti-Scl-70

Explanation: ***Anti-Ro/SSA***- This antibody is the primary risk factor for **Neonatal Lupus Erythematosus (NLE)**, which includes severe complications like potentially fatal **congenital heart block (CHB)** and transient cutaneous lupus.- Because it crosses the placenta, Anti-Ro/SSA targets fetal cardiac conduction tissue, potentially leading to irreversible **third-degree AV block** typically diagnosed between 18 and 24 weeks of gestation.*Anti-Sm*- **Anti-Smith (Anti-Sm)** antibodies are highly specific for the diagnosis of **Systemic Lupus Erythematosus (SLE)**, but are not independently associated with a high direct risk of **congenital heart block** or the NLE syndrome.- The presence of Anti-Sm indicates established SLE, increasing the overall risk of maternal flares during pregnancy, but it is not the main concern for direct fetal morbidity.*Anti-dsDNA*- High titers of **Anti-dsDNA** strongly correlate with the severity of maternal SLE, particularly **lupus nephritis**, and often herald disease flares, which can worsen pregnancy outcomes.- Increased disease activity due to high Anti-dsDNA heightens the risks of complications like **preeclampsia**, intrauterine growth restriction (IUGR), and fetal loss secondary to placental damage, but the antibody itself does not cause **CHB**.*Anti-RNP*- **Anti-RNP** antibodies are characteristically associated with **Mixed Connective Tissue Disease (MCTD)**, or less often overlap syndromes and SLE, but their primary risk to the fetus is lower than Anti-Ro/SSA.- Although MCTD pregnancies may carry risks like pulmonary hypertension, Anti-RNP is not a primary pathogenic factor for **Neonatal Lupus Erythematosus** or **congenital heart block**.*Anti-Scl-70*- **Anti-Scl-70 (Topoisomerase I)** is the definitive marker for the **diffuse cutaneous form of Systemic Sclerosis (Scleroderma)**, which is a different disease process from the patient’s SLE presentation (indicated by anti-Sm).- This antibody is generally associated with serious maternal complications like **interstitial lung disease** and **scleroderma renal crisis**, but not fetal complications like congenital heart block.

Question 27: A 35-year-old woman at 34 weeks gestation presents with severe headache, blurred vision, and RUQ pain. BP is 165/105 mmHg. Blood tests show AST 150 U/L, platelets 80,000/μL. What is the most appropriate management?

A. Antihypertensive therapy
B. Magnesium sulfate
C. Immediate delivery (Correct Answer)
D. Corticosteroids
E. Plasma exchange

Explanation: ***Immediate delivery*** - The patient presents with **severe preeclampsia** complicated by **HELLP syndrome** (hemolysis, elevated liver enzymes, low platelets) at 34 weeks gestation. - **Immediate delivery** is the definitive management for HELLP syndrome and severe preeclampsia, especially at or beyond 34 weeks, as it resolves the underlying placental pathology. *Antihypertensive therapy* - While essential for **maternal blood pressure control** (e.g., Labetalol, Hydralazine) to prevent complications like stroke, it is an adjunctive treatment, not the definitive cure for HELLP syndrome. - It manages a symptom but does not address the progressive organ damage or the underlying pathology requiring termination of pregnancy. *Magnesium sulfate* - **Magnesium sulfate** is crucial for **seizure prophylaxis** in patients with severe preeclampsia or HELLP syndrome, preventing eclampsia. - However, it does not treat the underlying liver dysfunction or thrombocytopenia characteristic of HELLP syndrome; delivery remains the curative intervention. *Corticosteroids* - **Antenatal corticosteroids** (e.g., Betamethasone, Dexamethasone) are primarily administered to accelerate **fetal lung maturity** when delivery is anticipated before 34 weeks gestation. - While they can improve platelet counts in HELLP syndrome, at 34 weeks with severe disease, the urgency of delivery typically outweighs the benefit of delaying for full corticosteroid effect, making immediate delivery the priority. *Plasma exchange* - **Plasma exchange** is primarily indicated for other thrombotic microangiopathies such as **Thrombotic Thrombocytopenic Purpura (TTP)** or severe atypical Hemolytic Uremic Syndrome (aHUS). - It is not the standard treatment for HELLP syndrome, where delivery is the primary intervention.

Question 28: A 44-year-old woman presents with recurrent miscarriages and a history of DVT. Blood tests show prolonged APTT, positive lupus anticoagulant, and anticardiolipin antibodies. What is the most appropriate treatment for future pregnancies?

A. Aspirin alone
B. Warfarin
C. Aspirin plus low molecular weight heparin (Correct Answer)
D. Prednisolone
E. Immunoglobulin

Explanation: ***Aspirin plus low molecular weight heparin*** - This combination is the standard of care for obstetric **Antiphospholipid Syndrome** (APS), preventing both **fetal loss** and **maternal venous thromboembolism** (VTE) associated with the condition. - **Aspirin** reduces platelet aggregation, while **LMWH** provides anticoagulation, together mitigating the prothrombotic state and improving live birth rates.*Aspirin alone* - While low-dose aspirin is part of the regimen, **monotherapy** is insufficient for patients with definite APS and prior thrombosis (DVT) to prevent severe pregnancy complications and recurrent miscarriage. - It primarily provides antiplatelet effects but lacks the robust **anticoagulation** necessary to counteract the increased risk of placental thrombosis caused by the antibodies.*Warfarin* - **Warfarin** is highly **teratogenic** (Category X) and is contraindicated during the first trimester of pregnancy due to the risk of fetal embryopathy. - Although effective for long-term non-pregnant anticoagulation, it must be replaced by **heparin** during pregnancy for safety reasons.*Prednisolone* - **Glucocorticoids** like prednisolone are not shown to improve live birth rates in routine APS and are not the specific treatment for the primary **thrombophilic state**. - Treatment with corticosteroids is typically reserved for co-existing autoimmune disorders, such as a **lupus flare**, rather than isolated APS.*Immunoglobulin* - **Intravenous Immunoglobulin (IVIG)** is an expensive therapy reserved only for refractory cases of APS or those with other complex autoimmune co-morbidities. - IVIG has little evidence to support its use as first-line therapy compared to the established combination of **aspirin and heparin** for improving outcomes in obstetric APS.

Question 29: A 38-year-old woman presents with fatigue, weight gain, and depression 6 months postpartum. TSH is 8 mU/L, free T4 is low. She is breastfeeding. What is the most appropriate treatment?

A. No treatment until breastfeeding stops
B. Levothyroxine 25 µg daily
C. Levothyroxine 50 µg daily (Correct Answer)
D. Liothyronine
E. Combined T4/T3 therapy

Explanation: ***Levothyroxine 50 µg daily***- This patient presents with **overt hypothyroidism** (elevated TSH and low free T4) 6 months postpartum, causing significant symptoms like fatigue, weight gain, and depression, which necessitates immediate treatment.- **Levothyroxine** is the standard treatment for hypothyroidism and is considered **safe during breastfeeding** as minimal amounts transfer to breast milk, making it appropriate for the mother and safe for the infant. A starting dose of 50 µg is suitable for symptomatic overt hypothyroidism in a young adult to achieve euthyroidism.*No treatment until breastfeeding stops*- Overt hypothyroidism with significant symptoms requires prompt treatment to alleviate patient suffering and prevent potential complications, regardless of **breastfeeding status**.- **Levothyroxine** is well-established as safe for both the mother and the infant during lactation, therefore, delaying treatment is unnecessary and detrimental to the patient's health.*Levothyroxine 25 µg daily*- While levothyroxine is the correct medication, a dose of **25 µg daily** is typically too low for the initial treatment of symptomatic **overt hypothyroidism** in a young, otherwise healthy adult.- This lower dose is generally reserved for elderly patients, those with cardiac comorbidities, or individuals with **mild subclinical hypothyroidism**.*Liothyronine*- **Liothyronine** (synthetic T3) has a very short half-life, leading to rapid fluctuations in hormone levels and potentially more side effects, especially cardiac ones.- It is generally **not recommended** for routine long-term management of primary hypothyroidism due to these pharmacokinetic challenges and lack of superior outcomes compared to T4 monotherapy.*Combined T4/T3 therapy*- Current evidence does not support the routine use of **combined T4/T3 therapy** as superior to levothyroxine (T4) monotherapy for the majority of patients with primary hypothyroidism.- T4 monotherapy is preferred as the body converts T4 to T3 peripherally, providing stable and physiologic levels of both hormones.

Question 30: A 34-year-old woman at 28 weeks gestation presents with sudden onset shortness of breath and chest pain. D-dimer is elevated. CTPA shows bilateral pulmonary emboli. What is the most appropriate anticoagulant?

A. Warfarin
B. Dabigatran
C. Rivaroxaban
D. Low molecular weight heparin (Correct Answer)
E. Unfractionated heparin

Explanation: ***Low molecular weight heparin***- It is the preferred anticoagulant for the treatment of **venous thromboembolism (VTE)** during pregnancy because its large molecular structure prevents it from crossing the **placenta**, ensuring fetal safety.- LMWH has stable pharmacokinetics, allows for fixed subcutaneous dosing without routine laboratory monitoring, and carries a lower risk of causing **heparin-induced thrombocytopenia (HIT)** compared to unfractionated heparin.*Warfarin*- It is a known **teratogen** that can cross the placenta, leading to **fetal warfarin syndrome** (e.g., nasal hypoplasia) and increased risk of fetal hemorrhage, especially during the first trimester and near delivery.- Because of these significant fetal risks, warfarin is generally contraindicated throughout pregnancy for routine VTE treatment.*Dabigatran*- Dabigatran is a **Direct Oral Anticoagulant (DOAC)**; its use in pregnancy is contraindicated due to a significant lack of robust human data regarding fetal safety and outcomes.- As a small molecule, it is presumed to cross the placenta, posing an unknown but potentially high risk of fetal **hemorrhage** or teratogenicity.*Rivaroxaban*- Rivaroxaban is another **DOAC** that should not be used in pregnancy as it crosses the placenta in animal models, and safety data for the human fetus are absent.- Like other DOACs, the unknown effect on fetal development and the risk of **fetal bleeding** makes it unsafe during any trimester.*Unfractionated heparin*- While UFH is safe for the fetus as it does not cross the placenta, it is less preferred than LMWH for long-term pregnancy management because it requires continuous intravenous infusion or frequent injections and intensive monitoring of **aPTT**.- Long-term use of UFH carries a higher maternal risk of **osteoporosis** and HIT compared to LMWH.

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