Prenatal Care — MCQs
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Additional protein and calorie requirements in pregnancy are?
Total amount of iron needed during an entire pregnancy
A 28-year-old female, gravida 2, para 1, presents to the antenatal clinic at 24 weeks for a routine check-up. Ultrasonography shows a normal fetus for gestational age at 24 weeks of gestation in a frank breech position, with no other abnormalities. What is the most appropriate next step in management?
What is the preferred modern medical term for spontaneous pregnancy loss occurring before 20 weeks of gestation?
When should folic acid supplementation start in order to be effective in preventing neural tube defects?
Most accurate method to confirm viable intrauterine pregnancy at 6 weeks' gestation is
USG can detect a gestation sac earliest at what time?
The widest transverse diameter of the fetal skull is what?
A pregnant woman in the third trimester has normal blood pressure when standing and sitting. When supine, her blood pressure drops to 90/50. What is the diagnosis?
Which of the following values is MOST accurate for the recommended dietary allowance during pregnancy?
Prenatal Care Indian Medical PG Practice Questions and MCQs
Question 601: Additional protein and calorie requirements in pregnancy are?
- A. 60 kcal/day calorie, 12 g/day protein
- B. 120 kcal/day calorie, 25 g/day protein
- C. 450 kcal/day calorie, 45 g/day protein
- D. 300 kcal/day calorie, 25 g/day protein (Correct Answer)
Explanation: ***300 kcal/day calorie, 25 g/day protein*** - This option correctly states the typical **additional daily calorie and protein requirements** to support fetal growth and maternal physiological changes during pregnancy, especially during the second and third trimesters. - The **300 kcal/day** accounts for the increased metabolic rate and energy needed for tissue synthesis, while **25 g/day of protein** is crucial for fetal tissue development and maternal blood volume expansion. *60 kcal/day calorie, 12 g/day protein* - These values are **too low** to meet the significantly increased metabolic and growth demands of pregnancy. - Insufficient calorie and protein intake can lead to **poor fetal growth** and adverse pregnancy outcomes. *120 kcal/day calorie, 25 g/day protein* - While the protein requirement of **25 g/day** is appropriate, the **120 kcal/day** increase is still too low to support the full physiological demands of pregnancy. - This would not adequately cover the energy cost of tissue accretion and increased basal metabolic rate. *450 kcal/day calorie, 45 g/day protein* - These values represent an **excessive increase** in both calorie and protein intake for normal pregnancy. - Such high additional intake is generally **not recommended** for the average pregnant woman and could potentially contribute to excessive maternal weight gain or other complications.
Question 602: Total amount of iron needed during an entire pregnancy
- A. 300 mg
- B. 1000 mg (Correct Answer)
- C. 700 mg
- D. 600 mg
Explanation: ***1000 mg*** - The total iron requirement during an entire pregnancy is approximately **1000 mg**, accounting for all physiological needs - This breaks down as: **300-500 mg for fetus and placenta**, **450-500 mg for maternal red blood cell mass expansion**, and **200 mg for basal losses** - This represents the comprehensive iron demand throughout pregnancy from conception to delivery *300 mg* - This represents only the iron transferred to the **fetus and placenta** - While significant, this is just one component of the total iron requirement, not the complete demand *600 mg* - This value approximates the iron needed for **maternal red cell mass expansion** alone - Does not account for fetal needs, placental requirements, or basal losses *700 mg* - This figure does not correspond to any standard recognized component of pregnancy iron requirements - Neither represents the total requirement nor any specific physiological compartment
Question 603: A 28-year-old female, gravida 2, para 1, presents to the antenatal clinic at 24 weeks for a routine check-up. Ultrasonography shows a normal fetus for gestational age at 24 weeks of gestation in a frank breech position, with no other abnormalities. What is the most appropriate next step in management?
- A. Glucose challenge test with 50 gm of glucose (Correct Answer)
- B. ECV
- C. Immediate LSCS
- D. Culture for Neisseria gonorrhoeae and Chlamydia trachomatis
Explanation: ***Glucose challenge test with 50 gm of glucose*** - The patient is 24 weeks pregnant, and a **glucose challenge test** is routinely performed between **24 and 28 weeks of gestation** to screen for gestational diabetes. - This screening is appropriate irrespective of fetal presentation, as it addresses a common and treatable pregnancy complication. *Culture for Neisseria gonorrhoeae and Chlamydia trachomatis* - While screening for sexually transmitted infections (STIs) like **gonorrhea** and **chlamydia** is important during pregnancy, it is typically performed at the **first prenatal visit** or during the **third trimester** for high-risk patients. - There is no indication from the provided information (e.g., risk factors, symptoms) to warrant this specific test at 24 weeks over routine gestational diabetes screening. *ECV* - **External cephalic version (ECV)** is a procedure to change a breech baby to a head-down position, usually performed closer to term, often around **36-37 weeks of gestation**. - At 24 weeks, a **frank breech position** is common and many fetuses will spontaneously turn to a cephalic presentation before term, making ECV premature at this stage. *Immediate LSCS* - **Immediate lower segment cesarean section (LSCS)** is a major surgical procedure indicated for obstetrical emergencies or planned for specific conditions late in pregnancy. - A **frank breech position** at 24 weeks with no other abnormalities is a normal variant and does not necessitate immediate delivery; many fetuses will spontaneously turn.
Question 604: What is the preferred modern medical term for spontaneous pregnancy loss occurring before 20 weeks of gestation?
- A. Early pregnancy loss (Correct Answer)
- B. Ectopic pregnancy
- C. Complete miscarriage
- D. Threatened miscarriage
Explanation: ***Early pregnancy loss*** - This is the **preferred modern term** for spontaneous pregnancy loss before 20 weeks of gestation, encompassing all types of miscarriage (threatened, inevitable, incomplete, complete, and missed). - It is increasingly used in clinical practice as it is considered more **patient-centered** and less stigmatizing than older terminology. - Synonymous with "spontaneous abortion" but with better patient communication value. *Ectopic pregnancy* - This refers to a pregnancy where the fertilized egg implants **outside the uterine cavity**, most commonly in the fallopian tube. - While non-viable, it represents **abnormal implantation** rather than spontaneous loss of an intrauterine pregnancy. - It is a separate diagnostic entity with different management. *Complete miscarriage* - This is a **specific subtype** of early pregnancy loss where all fetal and placental tissue has been completely expelled from the uterus. - It represents one outcome of miscarriage, not the general term for all spontaneous pregnancy losses. *Threatened miscarriage* - Refers to **vaginal bleeding before 20 weeks** with a closed cervix and **viable intrauterine pregnancy** on ultrasound. - This indicates **risk of pregnancy loss** but not actual loss—the pregnancy may continue normally. - Approximately 50% of threatened miscarriages progress to complete pregnancy loss.
Question 605: When should folic acid supplementation start in order to be effective in preventing neural tube defects?
- A. As soon as pregnancy is diagnosed
- B. Before the beginning of 2nd trimester
- C. At least one month before conception (Correct Answer)
- D. At least 1 week before conception
Explanation: ***At least one month before conception*** - **Neural tube closure** occurs very early in pregnancy, typically between days 21 and 28 after conception, often before a woman even knows she is pregnant. - Adequate **folate levels** are crucial during this critical period, making preconception supplementation essential for prevention. *As soon as pregnancy is diagnosed* - By the time pregnancy is diagnosed, often several weeks after conception, the **neural tube has already closed**, or the critical window for its closure has passed. - Starting supplementation at this point would be too late to prevent most **neural tube defects**. *Before the beginning of 2nd trimester* - The second trimester begins at week 13 of pregnancy, which is far too late to prevent **neural tube defects**, as the neural tube has already formed and closed in the first month. - This timing is not aligned with the critical developmental period for the neural tube. *At least 1 week before conception* - While closer to the correct timing, one week before conception may not be sufficient to build up optimal **folate levels** in the body, particularly in women with lower baseline intake or increased needs. - Most guidelines recommend **at least one month** to ensure adequate saturation and effectiveness.
Question 606: Most accurate method to confirm viable intrauterine pregnancy at 6 weeks' gestation is
- A. USG fetal cardiac activity (Correct Answer)
- B. Clinical examination
- C. Urine HCG test
- D. Doppler ultrasound in specific clinical situations
Explanation: **USG fetal cardiac activity** - At 6 weeks' gestation, the presence of **fetal cardiac activity** on ultrasound is the definitive sign of a **viable intrauterine pregnancy**. - This finding confirms both the presence of an embryo and its vital status, providing direct evidence of viability. *Urine HCG test* - A **urine HCG test** confirms the presence of pregnancy but does not provide information about its viability or location (intrauterine vs. ectopic). - High HCG levels can be present even in non-viable or ectopic pregnancies. *Clinical examination* - A **clinical examination** may reveal signs consistent with pregnancy, such as an enlarged uterus, but it cannot definitively confirm **intrauterine location** or **fetal viability** at 6 weeks' gestation. - These findings are supportive but not diagnostic of viability. *Doppler ultrasound in specific clinical situations* - Doppler ultrasound is typically used to assess **blood flow** to various structures and may be useful in later pregnancy for assessing fetal well-being or placental function. - It is not the primary or most accurate method to confirm early **fetal cardiac activity** or viability at 6 weeks' gestation compared to standard grayscale ultrasound.
Question 607: USG can detect a gestation sac earliest at what time?
- A. 5–6 weeks of gestation (Correct Answer)
- B. 7–8 weeks of gestation
- C. 10 weeks of gestation
- D. 12 weeks of gestation
Explanation: ***5–6 weeks of gestation*** - A **gestation sac** is typically visible by **transvaginal ultrasound** when the **beta-hCG level** reaches approximately 1500-2000 mIU/mL, which corresponds to around **5 weeks of gestation**. - By **6 weeks**, a **yolk sac** and often a **fetal pole** with cardiac activity can be identified within the gestational sac. *7–8 weeks of gestation* - By this gestational age, the **embryo** and **cardiac activity** are clearly visible, and the **crown-rump length (CRL)** can be accurately measured for dating. - While a gestation sac is undoubtedly present, it would have been visible much earlier. *10 weeks of gestation* - At this stage, the **gestation sac** is significantly larger, and the **fetus** is well-defined, with developing limbs and organs. - This is far beyond the earliest detection window for a gestation sac. *12 weeks of gestation* - By **12 weeks**, the first-trimester screening, including **nuchal translucency** measurement, is often performed, meaning the pregnancy is well-established. - The gestation sac would have been visible for several weeks prior to this.
Question 608: The widest transverse diameter of the fetal skull is what?
- A. Biparietal diameter (BPD) (Correct Answer)
- B. Occipito-frontal diameter (OFD)
- C. Bitemporal diameter (BTD)
- D. Suboccipito-frontal diameter (SFD)
Explanation: ***Biparietal diameter (BPD)*** - The **biparietal diameter** measures the distance between the two parietal eminences of the fetal skull, representing the widest transverse diameter. - This measurement is crucial for assessing fetal growth and is a key indicator during ultrasound examinations for dating pregnancy and estimating fetal weight. *Occipito-frontal diameter (OFD)* - The **occipito-frontal diameter** measures the distance from the occipital protuberance to the most prominent part of the frontal bone. - While an important longitudinal measurement, it does not represent the widest transverse diameter. *Bitemporal diameter (BTD)* - The **bitemporal diameter** measures the distance between the two temporal bones. - It is typically smaller than the biparietal diameter and is not considered the widest transverse diameter of the fetal skull. *Suboccipito-frontal diameter (SFD)* - The **suboccipito-frontal diameter** is a measurement taken from just below the occipital protuberance to the anterior fontanelle. - This diameter is relevant in specific fetal head positions during labor but is not the widest transverse diameter.
Question 609: A pregnant woman in the third trimester has normal blood pressure when standing and sitting. When supine, her blood pressure drops to 90/50. What is the diagnosis?
- A. Compression of IVC (inferior vena cava) (Correct Answer)
- B. Compression of internal iliac vessels (localized effects)
- C. Compression of the aorta
- D. Compression of the uterine artery
Explanation: ***Compression of IVC (inferior vena cava)*** - Compression of the **inferior vena cava** by the gravid uterus in the supine position reduces **venous return** to the heart, leading to decreased **cardiac output** and a drop in blood pressure. - This phenomenon is known as **supine hypotensive syndrome** or **vena caval syndrome** and is common in the third trimester. *Compression of the aorta* - While the gravid uterus can cause some degree of **aortic compression**, it typically affects blood flow to the lower extremities and may lead to **aortocaval compression syndrome**, but it doesn't primarily account for a systemic drop in blood pressure in the same way as IVC compression. - Aortic compression primarily results in reduced **femoral pulses** or differences in blood pressure between the arms and legs, not generalized hypotension. *Compression of internal iliac vessels (localized effects)* - Compression of internal iliac vessels would primarily lead to **localized symptoms** such as **pelvic pain** or **venous congestion** in the lower extremities, not a systemic drop in blood pressure. - The internal iliac vessels are smaller and their compression does not significantly impact overall venous return to the heart. *Compression of the uterine artery* - Compression of the uterine artery would primarily affect **blood supply to the uterus** and placenta, potentially leading to **fetal compromise**, but it does not directly cause systemic maternal hypotension. - While important for fetal well-being, it does not explain the maternal hypotensive episode observed when supine.
Question 610: Which of the following values is MOST accurate for the recommended dietary allowance during pregnancy?
- A. 30 mg iron (Correct Answer)
- B. 500 µg folic acid
- C. 350 kcal additional energy
- D. 310 mg magnesium
Explanation: ***30 mg iron*** - The recommended daily allowance for **iron** during pregnancy is **27 mg/day** according to ACOG and dietary guidelines. - **30 mg iron** is the **closest value** to the actual recommendation among all options provided and is within the therapeutically accepted range for iron supplementation. - Iron supplementation is crucial during pregnancy to prevent iron-deficiency anemia due to increased maternal blood volume and fetal iron demands. *350 kcal* - Additional **caloric intake** recommendations during pregnancy are approximately **340 kcal/day in the second trimester** and **452 kcal/day in the third trimester**. - While 350 kcal is reasonably close to the average, it's less precisely aligned with specific trimester recommendations compared to the iron value. *500 µg folic acid* - The recommended daily intake of **folic acid** during pregnancy is **600 µg/day** to prevent neural tube defects. - **500 µg is below the RDA** by 100 µg (approximately 17% less than recommended), making this an inadequate supplementation level. *310 mg magnesium* - The recommended daily allowance for **magnesium** during pregnancy is typically **350-360 mg/day**. - **310 mg is significantly below the RDA** (approximately 40-50 mg less than recommended), making this the least accurate option among all choices.
Practice by Chapter
Preconception Counseling
Practice Questions
Pregnancy Diagnosis and Dating
Practice Questions
Routine Antenatal Assessments
Practice Questions
Maternal Physiological Changes
Practice Questions
Nutrition in Pregnancy
Practice Questions
Screening Tests in Pregnancy
Practice Questions
Fetal Growth Assessment
Practice Questions
High-Risk Pregnancy Identification
Practice Questions
Antenatal Complications Management
Practice Questions
Psychosocial Aspects of Pregnancy
Practice Questions
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