Prenatal Care — MCQs

Prenatal Care Indian Medical PG Practice Questions and MCQs

Question 541: What is the most common cause of iron deficiency anemia during pregnancy?

A. Gastrointestinal bleeding
B. Hemolysis
C. Inadequate dietary intake (Correct Answer)
D. Increased plasma volume

Explanation: ***Inadequate dietary intake*** - Pregnancy significantly increases the demand for iron, and without sufficient intake, the mother's iron stores become depleted, leading to **iron deficiency anemia**. - Many pregnant women struggle to meet the **elevated iron requirements** through diet alone, making this the most frequent cause. *Gastrointestinal bleeding* - While GI bleeding can cause **iron deficiency anemia**, it is not the most common cause during pregnancy and is usually indicative of an underlying pathology. - Would typically present with other symptoms like **melena** or **hematochezia**, which are not universally seen in pregnant women with anemia. *Hemolysis* - **Hemolysis** (the destruction of red blood cells) can cause anemia, but it is not a direct cause of iron deficiency; rather, it leads to other forms of anemia. - Conditions like **hemolytic anemia** are less common than nutritional deficiencies in pregnant women. *Increased plasma volume* - **Increased plasma volume** during pregnancy leads to **hemodilution**, which can result in a drop in hemoglobin concentration, often termed "physiological anemia of pregnancy." - This is a relative decrease in red blood cell count due to dilution, not a true iron deficiency, as the total red cell mass increases, albeit at a slower rate than plasma volume.

Question 542: Which symptom is a common early sign of pregnancy?

A. Nausea (Correct Answer)
B. Dysuria
C. Spotting
D. Pelvic pain

Explanation: ***Nausea*** - Often referred to as **"morning sickness,"** nausea and vomiting are very common early symptoms of pregnancy, typically starting around 4 to 6 weeks of gestation. - This symptom is thought to be caused by rising levels of **human chorionic gonadotropin (hCG)** and estrogen. *Dysuria* - **Dysuria**, or painful urination, is more commonly associated with conditions like **urinary tract infections (UTIs)** rather than a normal early sign of pregnancy. - While UTIs can be more common in pregnancy, dysuria itself is a symptom of infection, not pregnancy directly. *Spotting* - **Light vaginal bleeding** or spotting can occur during early pregnancy, known as **implantation bleeding**, but it is less common than nausea. - However, spotting can also be a sign of other issues, so it's not considered a universally common or primary early sign of pregnancy. *Pelvic pain* - While some mild cramping can occur during implantation, persistent or severe **pelvic pain** is not a typical early sign of a healthy pregnancy. - Significant pelvic pain in early pregnancy could indicate complications such as an **ectopic pregnancy** or miscarriage.

Question 543: During a routine prenatal visit, a 25-year-old woman at 18 weeks of gestation is found to have a low-lying placenta. What is the most appropriate management?

A. Immediate cesarean delivery due to complications
B. Schedule for a repeat ultrasound at 28 weeks (Correct Answer)
C. Initiate corticosteroids for fetal lung maturity
D. Bed rest until further evaluation

Explanation: ***Schedule for a repeat ultrasound at 28 weeks*** - A **low-lying placenta** at 18 weeks is common, and in most cases, the placenta will "migrate" away from the cervix as the uterus grows. - A repeat ultrasound at **28 weeks (or later)** is necessary to assess whether the placenta has moved to a safe position for vaginal delivery or if it remains a **placenta previa**. *Immediate cesarean delivery due to complications* - **Cesarean delivery** is not indicated at 18 weeks based solely on a low-lying placenta, as it is a common finding that usually resolves. - Complications warranting immediate delivery, such as **severe bleeding** or **fetal distress**, are not mentioned here. *Bed rest until further evaluation* - **Bed rest** is generally not recommended for an uncomplicated low-lying placenta at this gestation, as it lacks evidence for efficacy and carries risks. - It might be considered in cases of **vaginal bleeding** with placenta previa, but not as a routine measure for this finding. *Initiate corticosteroids for fetal lung maturity* - **Corticosteroids** are given to accelerate **fetal lung maturity** in cases of anticipated preterm birth, typically before 34-37 weeks. - There is no indication of impending **preterm delivery** or other complications requiring corticosteroids at 18 weeks.

Question 544: A 35-year-old woman at 12 weeks of gestation presents with severe nausea and vomiting, weight loss, and dehydration. What is the diagnosis?

A. Acute fatty liver of pregnancy
B. Preeclampsia
C. Hyperemesis gravidarum (Correct Answer)
D. Gastroenteritis

Explanation: ***Hyperemesis gravidarum*** - This condition is characterized by **severe, persistent nausea and vomiting** during pregnancy, often leading to **weight loss** and **dehydration**. - It typically begins in the first trimester, peaking around 9-13 weeks, consistent with the patient's 12 weeks gestation. *Preeclampsia* - Preeclampsia usually manifests after **20 weeks of gestation** with symptoms like **hypertension**, **proteinuria**, and sometimes edema, which are not described here. - While preeclampsia can cause vomiting in severe cases, the primary symptoms are blood pressure and kidney-related. *Acute fatty liver of pregnancy* - This is a rare and severe liver disorder that typically occurs in the **third trimester** of pregnancy. - It presents with symptoms like nausea, vomiting, abdominal pain, and jaundice, but the timing is inconsistent with this patient's presentation. *Gastroenteritis* - While gastroenteritis causes nausea, vomiting, and dehydration, it is typically an **acute, self-limiting infection** and wouldn't be specifically tied to the pregnancy itself without further evidence of infection. - The severity and chronicity suggested by "severe nausea and vomiting" and "weight loss" are more indicative of hyperemesis gravidarum in a pregnant woman.

Question 545: What is the recommended daily dose of folic acid supplementation for pregnant women according to current Indian guidelines?

A. 500 micrograms daily (Correct Answer)
B. 400 micrograms daily
C. 200 micrograms daily
D. 800 micrograms daily

Explanation: ***500 micrograms daily*** - This is the **recommended dose** according to **ICMR-NIN (2020)** and **FOGSI guidelines** for pregnant women in India. - **WHO recommends 400-800 mcg daily**, and 500 mcg falls within this evidence-based range. - This dose effectively **prevents neural tube defects** (NTDs) like spina bifida and anencephaly when taken periconceptionally and during early pregnancy. - Should be started **at least one month before conception** and continued through the first trimester. *400 micrograms daily* - This was the older recommended dose and is still acceptable as per some international guidelines (USPSTF, older ACOG recommendations). - However, **current Indian guidelines specifically recommend 500 mcg** as the standard dose for the Indian population. - Still within the effective range but not the specific Indian recommendation. *200 micrograms daily* - This dose is **insufficient** for effective prevention of neural tube defects during pregnancy. - Does not meet the **increased folate demands** during pregnancy for DNA synthesis and fetal development. *800 micrograms daily* - This is at the **upper end of the WHO recommended range** (400-800 mcg). - While not harmful and still within safe limits, it is **higher than the standard Indian recommendation** of 500 mcg. - High-dose folic acid (4-5 mg daily) is reserved for **high-risk women** with previous NTD-affected pregnancy, diabetes, or on anticonvulsants.

Question 546: What is the gold standard diagnostic procedure for assessing placental location during the second trimester?

A. Transabdominal ultrasound imaging
B. Transvaginal ultrasound imaging (Correct Answer)
C. Computed Tomography (CT) scan
D. Magnetic Resonance Imaging (MRI)

Explanation: ***Transvaginal ultrasound imaging*** - The **gold standard for accurate assessment** of placental location, particularly for determining the exact distance between the placental edge and the internal cervical os. - Provides **superior resolution and clarity** of the cervix and lower uterine segment compared to transabdominal approach, with sensitivity approaching **95-100%** for placenta previa diagnosis. - Particularly valuable when the placenta is **posterior**, in **obese patients**, or when transabdominal findings are equivocal. - **Safe procedure** with no increased risk of bleeding, contrary to historical concerns. *Transabdominal ultrasound imaging* - The standard **initial screening tool** for placental localization in routine second-trimester anatomy scans. - May provide **suboptimal visualization** of the lower uterine segment, especially with a posterior placenta, full bladder distortion, or maternal obesity. - Can **overestimate** the distance between placental edge and cervical os due to bladder compression effects, potentially leading to false-positive diagnoses of placenta previa that resolve on transvaginal imaging. *Computed Tomography (CT) scan* - Involves **ionizing radiation** exposure to the fetus, which is contraindicated in pregnancy except for emergent maternal indications. - Provides **poor soft tissue contrast** for placental assessment compared to ultrasound. - Not used for routine obstetric imaging. *Magnetic Resonance Imaging (MRI)* - Excellent soft tissue contrast but **more expensive**, time-consuming, and less readily available than ultrasound. - Reserved for **complex scenarios** such as suspected placenta accreta spectrum disorders, morbidly adherent placenta, or when ultrasound findings are inconclusive. - Not the primary modality for routine placental localization in the second trimester.

Question 547: At what week post fertilization does the embryo transition to being called a fetus?

A. 8 weeks (Correct Answer)
B. 6 weeks
C. 10 weeks
D. 12 weeks

Explanation: ***8 weeks*** - The transition from an embryo to a **fetus** occurs at the end of the **8th week post-fertilization**. - By this point, all major organ systems have begun to form, and the developing organism enters a period of growth and maturation. *6 weeks* - At 6 weeks post-fertilization, the developing organism is still considered an **embryo**. - During this stage, critical processes like **neural tube closure** and early heart development are occurring. *10 weeks* - By 10 weeks post-fertilization, the organism is firmly established as a **fetus**. - This period is characterized by further development and refinement of organs and systems. *12 weeks* - At 12 weeks post-fertilization, the developing organism is a **fetus**. - This marks the end of the first trimester, with significant growth and movement becoming possible.

Question 548: The earliest crown-rump length (CRL) at which cardiac activity can be detected by transvaginal sonography (TVS) is:

A. 1-4mm (Correct Answer)
B. 1 cm
C. 6-7mm
D. 2-4 cm

Explanation: ***1-4mm*** - On **transvaginal ultrasonography (TVS)**, cardiac activity can typically be detected as early as **5-6 weeks of gestation** when the **crown-rump length (CRL)** is approximately **2-4mm**. - Cardiac activity is usually visible once the embryo reaches a **CRL of 5mm**, and a fetal pole with a CRL **≥5mm** without cardiac activity is suggestive of **embryonic demise** or **failed pregnancy**. - This represents the **earliest threshold** for reliable cardiac activity detection with modern high-resolution TVS. *1 cm* - A CRL of **1 cm (10 mm)** corresponds to approximately **7 weeks of gestation**. - By this size, cardiac activity should be clearly visible, making this far beyond the **earliest detection threshold**. - The absence of cardiac activity at this size would be diagnostic of **pregnancy failure**. *6-7mm* - While cardiac activity is reliably present at a CRL of **6-7mm** (around 6-6.5 weeks), this is not the **earliest** size at which it can be detected. - Modern TVS equipment can detect cardiac activity when the embryo is smaller, typically starting at **2-5mm CRL**. *2-4 cm* - A CRL of **2-4 cm (20-40 mm)** indicates **8.5 to 11 weeks of gestation**. - At this advanced stage, cardiac activity would be prominently visible, representing a much later developmental point than the **earliest detection threshold**.

Question 549: Which of the following findings on first trimester ultrasound is indicative of a poor prognosis?

A. Absence of fetal pole at 5 weeks
B. Absence of cardiac activity at 5 weeks
C. Absence of gestational sac at 4 weeks
D. Absence of cardiac activity at 8 weeks of gestation (Correct Answer)

Explanation: ***Absence of cardiac activity at 8 weeks of gestation*** - The absence of **fetal cardiac activity** at 8 weeks of gestation, when a fetal pole of at least **7 mm** should have clearly visible cardiac motion, definitively indicates a **non-viable pregnancy** and a poor prognosis. - At this gestational age, a visible heartbeat is a crucial marker of viability, and its absence strongly suggests a **missed abortion**. *Absence of fetal pole at 5 weeks* - A fetal pole is typically expected to be visualized between **5.5 and 6 weeks gestation**, so its absence at 5 weeks alone is **not necessarily indicative of a poor prognosis**. - The gestational sac should be present, and a follow-up ultrasound is often recommended to assess for further development. *Absence of cardiac activity at 5 weeks* - **Cardiac activity** is usually first detectable around **6 to 6.5 weeks gestation**, when the crown-rump length (CRL) reaches at least 2 mm. - Therefore, its absence at 5 weeks is a **normal finding** and not indicative of a poor prognosis. *Absence of gestational sac at 4 weeks* - A gestational sac is expected to be visible by **4.5 to 5 weeks of gestation** with transvaginal ultrasound. - Its absence at precisely 4 weeks might be due to **early timing** or inaccurate dating, and a repeat scan is often warranted, rather than assuming a poor prognosis immediately.

Question 550: What is the most conclusive clinical sign of pregnancy?

A. Uterine enlargement
B. Cervical softening
C. Amenorrhea
D. Fetal heart sound auscultation (Correct Answer)

Explanation: ***Fetal heart sound auscultation*** - The **direct auscultation of fetal heart sounds** is an unequivocal sign of a living fetus and, therefore, conclusive proof of pregnancy. - This sign confirms the presence of a **viable intrauterine pregnancy** and cannot be caused by other conditions. *Uterine enlargement* - While typically associated with pregnancy, uterine enlargement can also be caused by **fibroids**, adenomyosis, or other pelvic masses. - It is a **presumptive sign** as it needs further confirmation to rule out alternative causes. *Cervical softening* - Known as **Hegar's sign** or **Goodell's sign**, cervical softening is a probable sign of pregnancy due to increased vascularity and edema. - However, it can also be observed in conditions like **inflammation** or **pelvic congestion**, making it not conclusive. *Amenorrhea* - The absence of menstruation is often the **first presumptive sign** of pregnancy, prompting a woman to seek testing. - However, it can be caused by various factors unrelated to pregnancy, such as **stress**, hormonal imbalances, or underlying medical conditions.

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

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Screening Tests in Pregnancy

Practice Questions

Fetal Growth Assessment

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High-Risk Pregnancy Identification

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Antenatal Complications Management

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Psychosocial Aspects of Pregnancy

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