Prenatal Care Practice Questions

Q: Which of the following physiological changes is LEAST likely to occur during pregnancy?

A decrease in vital capacity.. **Explanation:** The correct answer is **D. A decrease in vital capacity.** In pregnancy, the diaphragm is displaced superiorly by approximately 4 cm due to the enlarging uterus. However, this is compensated for by an increase in the anteroposterior and transverse diameters of the thoracic cage (mediated by relaxin). Consequently, while the **Functional Residual Capacity (FRC)** and **Residual Volume (RV)** decrease, the **Vital Capacity (VC) remains unchanged** or may even show a slight increase. This is a high-yield distinction in maternal physiology. **Analysis of Incorrect Options:** * **Option A:** Pregnancy is a state of "hemodilution." While platelet production increases, the massive increase in plasma volume leads to a relative decrease in concentration, often resulting in **gestational thrombocytopenia** (platelets at the lower end of normal). * **Option B:** The **White Blood Cell (WBC) count increases** during pregnancy (physiologic leukocytosis), typically ranging from 5,000–12,000/mm³ and can rise up to 25,000/mm³ during labor. * **Option C:** Pregnancy is a **hypercoagulable state**. There is a marked increase in most clotting factors (especially VII, VIII, IX, X, and Fibrinogen) and a decrease in Protein S and fibrinolytic activity to prevent postpartum hemorrhage. **NEET-PG High-Yield Pearls:** * **Most common respiratory change:** Increase in **Tidal Volume** (by ~40%), leading to physiologic hyperventilation and respiratory alkalosis. * **Cardiac Output:** Increases by 30-50%, peaking at 28-32 weeks. * **Blood Volume:** Plasma volume increases (50%) more than RBC mass (20-30%), causing **physiologic anemia**.

Q: A 38-year-old primigravida, pregnant following IVF, has a sonogram at 12 weeks 4 days gestation showing a nuchal translucency of 5 mm. Which of the following is the only true statement?

The embryo has a high risk of cardiac malformation.. **Explanation:** **1. Why Option B is Correct:** Nuchal Translucency (NT) is the sonographic appearance of a collection of fluid under the skin behind the fetal neck in the first trimester (11 to 13+6 weeks). A measurement of **≥3.5 mm** is considered significantly increased. While NT is primarily used to screen for aneuploidies (like Down syndrome), an increased NT in a **euploid (chromosomally normal) fetus** is strongly associated with **congenital heart defects (CHDs)**, such as Tetralogy of Fallot or Septal defects. This is likely due to transient heart failure or altered hemodynamics during development. **2. Why the Other Options are Incorrect:** * **Option A:** Neural tube defects (NTDs) are associated with abnormal maternal serum alpha-fetoprotein (MSAFP) and specific second-trimester ultrasound findings (e.g., lemon sign, banana sign), not increased NT. * **Option C:** Increased NT usually **resolves** or evolves into a cystic hygroma or nuchal edema by the second trimester; it does not typically "enlarge" as a standard progression. * **Option D:** While Turner syndrome (45,X) is associated with very high NT/cystic hygroma, the **most common** aneuploidy associated with increased NT is **Trisomy 21 (Down syndrome)**. **Clinical Pearls for NEET-PG:** * **Ideal Timing for NT:** 11 weeks to 13 weeks 6 days (CRL 45–84 mm). * **Combined Screening:** NT + PAPP-A + hCG (Detection rate for Down syndrome ~85-90%). * **Next Step:** If NT is increased, the patient should be offered invasive testing (CVS/Amniocentesis) for karyotyping and a **Fetal Echocardiogram** at 18–22 weeks. * **IVF Pregnancy:** IVF itself is an independent risk factor for cardiac malformations, further increasing the relevance of this finding.

Q: What is the minimum recommended daily dosage of folic acid supplementation for women during the preconception period?

400 micrograms. **Explanation:** The correct answer is **400 micrograms (0.4 mg)**. Folic acid is a B-complex vitamin essential for DNA synthesis and amino acid metabolism. During the first few weeks of pregnancy—often before a woman knows she is pregnant—the neural tube closes. Adequate folate levels are critical to prevent **Neural Tube Defects (NTDs)** such as anencephaly and spina bifida. * **Why 400 mcg is correct:** International guidelines (WHO, FIGO) and national protocols (MoHFW, India) recommend a daily dose of 400 mcg starting at least **one month prior to conception** and continuing through the first trimester (12 weeks) to ensure optimal maternal serum and red cell folate levels. * **Why A, B, and C are incorrect:** 10, 40, and 100 micrograms are sub-therapeutic doses. They do not provide sufficient folate to significantly reduce the risk of NTDs in the general population. **High-Yield Clinical Pearls for NEET-PG:** 1. **High-Risk Dosage:** For women with a **previous history** of a child with an NTD, the recommended dose is increased tenfold to **4 mg (4000 mcg)** daily. 2. **Timing:** Supplementation must ideally begin **pre-conceptionally** because the neural tube closes by the **28th day** post-conception. 3. **Other High-Risk Groups:** Women with diabetes, those on anti-epileptic drugs (e.g., Valproate), or those with malabsorption syndromes also require higher doses (5 mg). 4. **Iron-Folic Acid (IFA) Tablet:** Under the *Anemia Mukt Bharat* guidelines, pregnant women are prescribed 60 mg elemental iron and 500 mcg folic acid daily for 180 days starting from the second trimester.

Q: What is the total amount of iron required for the fetus during the entire pregnancy tenure?

0.3 gm. **Explanation:** The total iron requirement during a normal pregnancy is approximately **1000 mg (1 gm)**. However, this requirement is distributed among various physiological compartments. To answer this question correctly, one must distinguish between the *total maternal requirement* and the *specific fetal requirement*. **1. Why 0.3 gm (300 mg) is correct:** Out of the total 1000 mg required during pregnancy, the distribution is as follows: * **Fetus and Placenta:** ~300 mg (0.3 gm) * **Expansion of Maternal Red Cell Mass:** ~450–500 mg * **Obligatory losses (skin, urine, feces):** ~200 mg Since the question specifically asks for the amount required for the **fetus**, 0.3 gm is the correct physiological value. **2. Analysis of Incorrect Options:** * **A. 1 gm:** This represents the **total** iron requirement for the entire pregnancy (maternal + fetal needs). * **B. 0.1 gm:** This is too low; it does not account for the rapid erythropoiesis and hepatic storage required by the developing fetus. * **D. 3 gm:** This is an overestimation and exceeds the total physiological capacity and requirement of a standard pregnancy. **3. High-Yield Clinical Pearls for NEET-PG:** * **Daily Requirement:** In the second and third trimesters, the daily iron requirement increases to approximately **5–7 mg/day**. * **Iron Absorption:** Iron absorption increases significantly during the latter half of pregnancy due to up-regulation of divalent metal transporter 1 (DMT1). * **Prophylaxis:** The Government of India (IFA program) recommends **100 mg of elemental iron** and 500 mcg of folic acid daily for 180 days during pregnancy to meet these demands. * **Fetal Priority:** The fetus acts as a "parasite" for iron; it will extract iron from maternal circulation even if the mother is severely anemic, via active transport across the placenta.

Q: Which of the following statements about pregnancy is incorrect?

At 40 weeks, fundal height is at the xiphisternum.. ### Explanation The correct answer is **D**, as the statement is clinically inaccurate. **1. Why Option D is Incorrect (The Correct Answer):** In a normal pregnancy, the fundal height reaches the **xiphisternum at 36 weeks**. By **40 weeks**, the fundal height actually **descends** to the level of 32 weeks (between the umbilicus and xiphisternum). This phenomenon is known as **"Lightening"** or "the welcome sign," occurring as the fetal head engages into the maternal pelvis, reducing pressure on the diaphragm. **2. Analysis of Other Options:** * **A. Amenorrhea is the earliest symptom:** In a woman of reproductive age with regular cycles, the sudden cessation of menstruation is the first clinical sign of pregnancy. * **B. Fetal heart sounds (FHS) at 18–20 weeks:** Using a traditional **Pinard stethoscope**, FHS are typically audible between 18 and 20 weeks. (Note: Doppler can detect FHS earlier, around 10–12 weeks). * **C. Fetal parts at 20 weeks:** Palpation of fetal parts (fetal poles and trunk) via abdominal examination usually becomes possible around the 20th week of gestation. **3. NEET-PG High-Yield Pearls:** * **Fundal Height Landmarks:** * 12 weeks: Just felt per abdomen (at pubic symphysis). * 24 weeks: At the level of the **umbilicus**. * 36 weeks: At the **xiphisternum**. * **Quickening:** The first perception of fetal movement by the mother occurs at **18 weeks** in primigravida and **16 weeks** in multigravida. * **Hegar’s Sign:** Softening of the isthmus, a clinical sign of pregnancy seen between 6–10 weeks.

Q: All of the following are true regarding renal changes in normal pregnancy EXCEPT:

Increase in serum bicarbonate levels.. **Explanation:** In normal pregnancy, the renal system undergoes significant physiological adaptations to accommodate the metabolic demands of the fetus and the mother. **Why Option C is the correct (False) statement:** Pregnancy is characterized by **chronic respiratory alkalosis** due to progesterone-induced hyperventilation (increased tidal volume). To compensate for this alkalosis, the kidneys increase the excretion of bicarbonate. Consequently, **serum bicarbonate levels decrease** (typically from 24–26 mEq/L to about 18–22 mEq/L) to maintain a near-normal blood pH. **Analysis of other options:** * **Option A:** Due to the marked increase in GFR, the clearance of creatinine is enhanced. Therefore, normal serum creatinine levels in pregnancy are lower (0.4–0.8 mg/dL). A value of 0.9 mg/dL, while normal in non-pregnant adults, may indicate renal impairment in a pregnant patient. * **Option B:** Renal Plasma Flow (RPF) and Glomerular Filtration Rate (GFR) increase by approximately 40–50% starting early in the first trimester. This is driven by systemic vasodilation and increased cardiac output. * **Option D:** The placenta produces the enzyme **vasopressinase** (aminopeptidase), which degrades Arginine Vasopressin (AVP). In some cases, excessive production can lead to **Transient Gestational Diabetes Insipidus**, which typically resolves postpartum. **High-Yield Clinical Pearls for NEET-PG:** * **Glucosuria:** Common in pregnancy due to increased GFR and reduced tubular reabsorption of glucose; it does not necessarily indicate diabetes. * **Hydronephrosis:** Physiological dilation of the ureters and renal pelvis (Right > Left) occurs due to progesterone-induced smooth muscle relaxation and mechanical compression by the gravid uterus. * **Positioning:** GFR is highest in the lateral recumbent position and decreases when supine due to aortocaval compression.

Q: A 28-year-old woman, G2 P1, at 20 weeks gestation presents with fever, cough, and myalgia for 3 days. Her child at home is also sick. The patient is suspected to have Influenza. What is the best treatment for this patient during pregnancy?

Oseltamivir for 5 days. **Explanation:** **Correct Answer: C. Oseltamivir for 5 days** **Medical Concept:** Influenza in pregnancy is associated with a higher risk of severe morbidity, including pneumonia and respiratory failure, due to physiological changes in the cardiovascular and respiratory systems. **Oseltamivir (a Neuraminidase Inhibitor)** is the drug of choice for treating influenza in pregnant and postpartum women. It is most effective when started within 48 hours of symptom onset, but it should be administered even after 48 hours in pregnant patients due to the high risk of complications. The standard therapeutic dose is **75 mg twice daily for 5 days**. **Analysis of Incorrect Options:** * **Options A & B (Amantadine):** Amantadine and Rimantadine are adamantanes. They are no longer recommended for the treatment of influenza because of widespread resistance among circulating influenza A viruses and their lack of efficacy against influenza B. Furthermore, amantadine is potentially teratogenic. * **Option D:** Combination therapy with adamantanes is not indicated due to the resistance patterns mentioned above. A 10-day course is typically reserved for prophylaxis in specific high-risk exposures, not standard treatment. **High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice:** Oseltamivir (75 mg BID for 5 days) is the preferred antiviral in pregnancy. * **Chemoprophylaxis:** For pregnant women with close contact exposure, Oseltamivir (75 mg OD for 7–10 days) is recommended. * **Vaccination:** The inactivated influenza vaccine is **safe and recommended** for all pregnant women during any trimester of pregnancy. It provides passive immunity to the newborn. * **Category:** Oseltamivir is a Pregnancy Category C drug, but its benefits in preventing maternal complications far outweigh the theoretical risks.

Question 1

Which of the following physiological changes is LEAST likely to occur during pregnancy?

Accepted Answer

A decrease in vital capacity.

Answer

A reduction in platelet concentration to the lower end of the normal range.

Answer

An increase in the white blood cell count.

Answer

An increase in the levels of coagulation factors VII, VIII, and X.

Question 2

A 38-year-old primigravida, pregnant following IVF, has a sonogram at 12 weeks 4 days gestation showing a nuchal translucency of 5 mm. Which of the following is the only true statement?

Accepted Answer

The embryo has a high risk of cardiac malformation.

Answer

The embryo has a high risk of neural tube defect.

Answer

The nuchal translucency will enlarge by 20 weeks.

Answer

If the embryo is aneuploid, the most likely diagnosis is Turner syndrome.

Question 3

What is the minimum recommended daily dosage of folic acid supplementation for women during the preconception period?

Accepted Answer

400 micrograms

Answer

10 micrograms

Answer

40 micrograms

Answer

100 micrograms

Question 4

What is the total amount of iron required for the fetus during the entire pregnancy tenure?

Accepted Answer

0.3 gm

Answer

1 gm

Answer

0.1 gm

Answer

3 gm

Question 5

Which of the following statements about pregnancy is incorrect?

Accepted Answer

At 40 weeks, fundal height is at the xiphisternum.

Answer

Amenorrhea is the earliest symptom.

Answer

Fetal heart sounds are heard between 18-20 weeks.

Answer

Fetal parts are palpable at 20 weeks of gestation.

Question 6

A 31-year-old G3P2 patient at 34 weeks gestation presents with home blood pressure readings of 100-110/60-70 mmHg. She complains of bilateral pedal edema and mild calf pain at night. Urine dipstick shows trace protein. On examination, there is pitting edema of both legs without calf tenderness. What is the best advice to this patient?

Accepted Answer

Reassure the patient that this is a normal finding of pregnancy.

Answer

Prescribe Lasix (Furosemide) to relieve the painful swelling.

Answer

Perform venous Doppler studies to rule out deep vein thrombosis.

Answer

Admit the patient and investigate to rule out pre-eclampsia.

Question 7

A 21-year-old healthy woman, who is in week 34 of a normal pregnancy, complains of itching with burning pain in the perianal region for the past 4 months. She noted a small amount of bright red blood on toilet paper last week. Which of the following underlying conditions is most likely to be present in this patient?

Accepted Answer

External hemorrhoid

Answer

Filariasis

Answer

Polyarteritis nodosa

Answer

Micronodular cirrhosis

Question 8

All of the following are true regarding renal changes in normal pregnancy EXCEPT:

Accepted Answer

Increase in serum bicarbonate levels.

Answer

Serum creatinine decreases.

Answer

GFR and renal plasma flow increase by 50%.

Answer

Increased placental metabolism of AVP may cause transient diabetes insipidus during pregnancy.

Question 9

Which of the following is the most sensitive or gold standard test for assessing HCG in maternal serum?

Accepted Answer

Radioimmune assay

Answer

ELISA

Answer

Latex test

Answer

Bioassay

Question 10

A 28-year-old woman, G2 P1, at 20 weeks gestation presents with fever, cough, and myalgia for 3 days. Her child at home is also sick. The patient is suspected to have Influenza. What is the best treatment for this patient during pregnancy?

Accepted Answer

Oseltamivir for 5 days

Answer

Amantadine for 5 days

Answer

Amantadine for 10 days

Answer

Oseltamivir and amantadine for 10 days

Prenatal Care — MCQs

Prenatal Care — MCQs

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