Prenatal Care — MCQs

Prenatal Care Indian Medical PG Practice Questions and MCQs

Question 131: By ultrasonography, what is the earliest sign of conception?

A. Small white gestational ring (Correct Answer)
B. Presence of foetal pole
C. Presence of yolk sac
D. Presence of cardiac pulsations

Explanation: The earliest ultrasonographic evidence of pregnancy is the **gestational sac**, which appears as a **small white gestational ring** (echogenic ring) surrounding a small fluid collection. ### **Detailed Explanation** 1. **Small white gestational ring (Correct):** This represents the chorionic cavity. On Transvaginal Sonography (TVS), it can be visualized as early as **4 to 4.5 weeks** of gestation. It is typically located eccentrically within the decidua (the "double decidual sac sign") and grows at a rate of approximately 1 mm per day. 2. **Presence of yolk sac (Incorrect):** The yolk sac is the first structure to appear *inside* the gestational sac. It confirms an intrauterine pregnancy and is visible at approximately **5 weeks** via TVS. 3. **Presence of foetal pole (Incorrect):** The embryo (fetal pole) appears adjacent to the yolk sac at approximately **5.5 to 6 weeks**. 4. **Presence of cardiac pulsations (Incorrect):** Fetal heart activity is the definitive sign of a live embryo. It is typically detectable when the embryo measures 5 mm or more, usually around **6 to 6.5 weeks** via TVS. ### **High-Yield Clinical Pearls for NEET-PG** * **Order of Appearance (TVS):** Gestational Sac (4.5w) → Yolk Sac (5w) → Fetal Pole (5.5w) → Cardiac Activity (6w). * **Discriminatory Zone:** The level of serum β-hCG at which a gestational sac should be visible. For TVS, this is **1,500–2,000 mIU/mL**; for Transabdominal Scan (TAS), it is **6,500 mIU/mL**. * **Double Decidual Sign:** Helps distinguish a true gestational sac from a "pseudogestational sac" seen in ectopic pregnancies. It is formed by the decidua capsularis and decidua parietalis.

Question 132: Which one of the following is true about the visualization of the gestational sac?

A. Detected at 4-5 weeks by transvaginal ultrasound
B. Detected at 5-6 weeks by transabdominal ultrasound
C. Detected at 3-4 weeks by transabdominal ultrasound
D. Both 'a' and 'b' (Correct Answer)

Explanation: **Explanation:** The visualization of the gestational sac is the earliest sonographic sign of pregnancy. The timing of its appearance depends significantly on the resolution of the ultrasound probe used (Transvaginal vs. Transabdominal). 1. **Why Option D is correct:** * **Transvaginal Sonography (TVS):** Due to the proximity of the probe to the pelvic organs, TVS can detect the gestational sac as early as **4.5 to 5 weeks** of gestation (calculated from the LMP). At this stage, the sac typically measures 2–3 mm in diameter. * **Transabdominal Sonography (TAS):** Because the sound waves must travel through the abdominal wall and a full bladder, TAS has lower resolution and detects the sac approximately one week later than TVS, typically at **5.5 to 6 weeks**. 2. **Why Option C is incorrect:** At 3–4 weeks, the blastocyst is either just implanting or is too small to be resolved by any current ultrasound technology. The earliest a sac is visible is mid-way through the 4th week via TVS. **High-Yield Clinical Pearls for NEET-PG:** * **Discriminatory Zone:** This is the level of serum β-hCG at which a gestational sac should be visible. * For **TVS**, the zone is **1,500–2,000 mIU/ml**. * For **TAS**, the zone is **6,000–6,500 mIU/ml**. * **Intrauterine Location:** A true gestational sac is usually eccentrically located within the endometrium (the "Double Decidual Sign"), which helps distinguish it from a "pseudogestational sac" seen in ectopic pregnancies. * **Sequence of Appearance:** Gestational Sac (5 wks) → Yolk Sac (5.5 wks) → Embryo/Fetal pole with cardiac activity (6 wks).

Question 133: At what gestational age does the uterus become palpable abdominally?

A. 10 weeks
B. 12 weeks (Correct Answer)
C. 14 weeks
D. 16 weeks

Explanation: ### Explanation **Correct Answer: B. 12 weeks** **1. Why 12 weeks is correct:** During the first trimester, the uterus is a pelvic organ. As the pregnancy progresses, the uterus enlarges due to hypertrophy and hyperplasia of the myometrium. By the **end of the 12th week**, the fundus of the uterus reaches the level of the **symphysis pubis**. At this point, it rises out of the true pelvis and becomes palpable per abdomen for the first time. **2. Why the other options are incorrect:** * **10 weeks:** The uterus is still entirely a pelvic organ, roughly the size of an orange, and cannot be felt through the abdominal wall. * **14 weeks:** The uterus is well into the abdominal cavity (about 2 fingerbreadths above the symphysis), but it first becomes palpable at 12 weeks. * **16 weeks:** At this stage, the fundus is typically midway between the symphysis pubis and the umbilicus. **3. High-Yield Clinical Pearls for NEET-PG:** To answer "Height of Fundus" questions accurately, remember these landmark milestones: * **12 weeks:** At the level of the symphysis pubis (becomes an abdominal organ). * **16 weeks:** Midway between the symphysis pubis and the umbilicus. * **20 weeks:** At the level of the lower border of the umbilicus. * **24 weeks:** At the level of the upper border of the umbilicus. * **36 weeks:** At the level of the xiphisternum (highest point). * **40 weeks:** Drops to the level of 32 weeks due to "lightening" (engagement of the fetal head). **Note:** If the fundal height is significantly greater than the period of amenorrhea, consider multiple pregnancy, polyhydramnios, or molar pregnancy.

Question 134: A 26-year-old female with a history of abortion due to a fetal neural tube defect in the previous pregnancy presents for an antenatal visit. What is the recommended daily dosage of folic acid for this patient?

A. 4 micrograms per day
B. 40 micrograms per day
C. 400 micrograms per day
D. 4000 micrograms per day (Correct Answer)

Explanation: **Explanation:** The correct answer is **4000 micrograms per day (D)**. **1. Why the correct answer is right:** Neural Tube Defects (NTDs) are congenital malformations resulting from the failure of the neural tube to close during the 3rd and 4th weeks of gestation. Folic acid is essential for DNA synthesis and methylation processes required for this closure. In clinical practice, patients are categorized based on risk: * **High Risk:** Women with a **previous history of a child/fetus with an NTD** (as in this case), or those with epilepsy on certain anticonvulsants (Valproate), or pre-gestational diabetes. These patients require a "therapeutic" dose of **4 mg (4000 mcg)** daily to reduce the recurrence risk by approximately 70%. * This high-dose supplementation should ideally start **at least 1–3 months preconception** and continue through the first trimester (12 weeks). **2. Why the incorrect options are wrong:** * **A & B (4 mcg & 40 mcg):** These doses are sub-therapeutic and insufficient to meet even the basic physiological requirements of a non-pregnant adult. * **C (400 mcg):** This is the **standard prophylactic dose** recommended for "Low Risk" women (those with no prior history of NTD) to prevent the first occurrence of the defect. **3. NEET-PG High-Yield Pearls:** * **Timing:** Folic acid must be started *before* conception because the neural tube closes by **day 28** of gestation, often before a woman realizes she is pregnant. * **Low Risk Dose:** 0.4 mg (400 mcg) daily. * **High Risk Dose:** 4 mg (4000 mcg) daily. * **Screening:** Maternal Serum Alpha-Fetoprotein (MSAFP) is elevated in open NTDs; it is typically screened between 15–20 weeks of gestation. * **Lemon Sign & Banana Sign:** Classic ultrasound findings associated with Spina Bifida (Arnold-Chiari II malformation).

Question 135: Ultrasound is done in the first trimester for all of the following conditions EXCEPT:

A. Diagnosis of multiple pregnancy
B. Diagnosis of fetal anomalies (Correct Answer)
C. Estimation of gestational age
D. Diagnosis of ectopic pregnancy

Explanation: **Explanation:** The primary objective of a first-trimester ultrasound (typically performed between 11 and 13+6 weeks) is to confirm viability, establish accurate dating, and determine chorionicity. While major structural defects (like anencephaly) may occasionally be spotted, the **standard "Anomaly Scan" (Targeted Imaging for Fetal Anomalies - TIFFA)** is ideally performed in the **second trimester (18–20 weeks)**. At this stage, fetal organogenesis is complete, and the structures are large enough to be visualized in detail. **Analysis of Options:** * **Diagnosis of fetal anomalies (Correct):** This is the exception because a comprehensive anatomical survey is not feasible in the first trimester. The first trimester focuses on screening markers (like Nuchal Translucency) rather than a definitive diagnosis of most structural anomalies. * **Diagnosis of multiple pregnancy:** Ultrasound is the gold standard for diagnosing twins and is most accurate in the first trimester for determining **chorionicity** (Lambda vs. T-sign), which is critical for management. * **Estimation of gestational age:** Measurement of the **Crown-Rump Length (CRL)** in the first trimester is the most accurate method for pregnancy dating (error margin ±3–5 days). * **Diagnosis of ectopic pregnancy:** Ultrasound is essential to confirm the location of the pregnancy. Visualizing an empty uterus with an adnexal mass or a gestational sac in the fallopian tube is diagnostic. **NEET-PG High-Yield Pearls:** * **Best time for CRL:** 7 to 12 weeks. * **NT Scan window:** 11 weeks to 13 weeks 6 days (CRL 45–84 mm). * **Earliest sign of pregnancy on TVS:** Gestational sac (at 4.5–5 weeks). * **Yolk sac:** First structure seen within the gestational sac (confirms intrauterine pregnancy).

Question 136: What is the minimum recommended number of Antenatal Care (ANC) visits during a normal pregnancy?

A. 3 (Correct Answer)
B. 5
C. 9
D. 12

Explanation: **Explanation:** The correct answer is **A (3)**. According to the **Ministry of Health and Family Welfare (MoHFW)** and the **National Health Mission (NHM)** guidelines in India, the minimum recommended number of Antenatal Care (ANC) visits for a normal pregnancy is **four**. However, in the context of standard medical examinations and older WHO/Indian guidelines often tested in NEET-PG, the "minimum" requirement to ensure basic maternal and fetal well-being is often cited as **3 or 4**. Since 3 is the lowest threshold provided in the options that aligns with traditional public health benchmarks (1st visit: <12 weeks, 2nd visit: 14-26 weeks, 3rd visit: 28-34 weeks), it is the designated correct choice. **Analysis of Incorrect Options:** * **Option B (5):** While more visits are beneficial, 5 is not the defined "minimum" standard in national protocols. * **Option C (9):** This aligns more closely with the **WHO 2016 "Antenatal Care Model,"** which recommends a minimum of **8 contacts** to reduce perinatal mortality. However, this has not yet replaced the "minimum" threshold in many Indian competitive exams. * **Option D (12):** This represents the traditional intensive schedule (monthly until 28 weeks, fortnightly until 36, then weekly), which is ideal but not the "minimum" required for public health coverage. **High-Yield Clinical Pearls for NEET-PG:** * **Pradhan Mantri Surakshit Matritva Abhiyan (PMSMA):** Conducted on the **9th of every month** to provide fixed-day ANC services. * **Ideal ANC Schedule:** 1st visit (as soon as pregnancy is suspected), 2nd (14-26 weeks), 3rd (28-34 weeks), and 4th (36 weeks to term). * **WHO 2016 Update:** Now recommends **8 contacts** for a positive pregnancy experience. * **Weight Gain:** Average recommended weight gain during pregnancy is **11 kg**.

Question 137: Expected date of delivery is calculated by all EXCEPT:

A. Nine calendar months plus 7 days
B. 280 days or 40 weeks
C. 266 days or 38 weeks (Correct Answer)
D. 10 lunar months

Explanation: The **Expected Date of Delivery (EDD)** is traditionally calculated based on the **First Day of the Last Menstrual Period (LMP)**. This assumes a standard 28-day menstrual cycle where ovulation occurs on day 14. ### **Explanation of Options:** * **Option C (Correct):** While the actual duration of human gestation (from the moment of fertilization/conception) is approximately **266 days or 38 weeks**, the EDD is clinically defined by the LMP, not the date of conception. Therefore, 266 days is the *gestational age*, but it is not the standard formula used to calculate the *Expected Date of Delivery*. * **Option A:** This represents **Naegele’s Rule**, the gold standard for calculating EDD (LMP + 9 months + 7 days). * **Option B:** This is the standard clinical duration of pregnancy calculated from the LMP (40 weeks × 7 days = 280 days). * **Option D:** A lunar month is 28 days. Therefore, 10 lunar months (10 × 28 = 280 days) is equivalent to the standard duration of pregnancy. ### **High-Yield Clinical Pearls for NEET-PG:** 1. **Naegele’s Rule Adjustment:** If a patient has a cycle longer than 28 days, add the extra days to the EDD. If shorter, subtract them. (Formula: LMP + 9 months + 7 days + [Cycle length - 28 days]). 2. **Best USG Parameter:** In the first trimester, **Crown-Rump Length (CRL)** is the most accurate method to determine gestational age (accuracy ± 3–5 days). 3. **Rule of Nine:** Pregnancy is also described as 3 trimesters of 13 weeks each. 4. **Post-term Pregnancy:** Defined as a pregnancy that extends to or beyond **42 weeks (294 days)** from the LMP.

Question 138: Hegar's sign of pregnancy is:

A. Uterine contraction
B. Bluish discoloration of vagina
C. Softening of the uterine isthmus (Correct Answer)
D. The first noticeable fetal movements

Explanation: **Explanation:** **Hegar’s sign** is a clinical indicator of early pregnancy, typically detectable between **6 to 10 weeks** of gestation. It is characterized by the **softening of the uterine isthmus** (the lower part of the uterus between the cervix and the body). During a bimanual examination, the softening is so marked that the cervix and the body of the uterus feel like two separate structures, and the fingers of the internal and external hands can almost meet. This occurs due to increased vascularity and pelvic congestion (the influence of estrogen and progesterone). **Analysis of Incorrect Options:** * **A. Uterine contraction:** These are known as **Braxton Hicks contractions**. They are painless, irregular contractions that can start early in pregnancy but are usually felt after the first trimester. * **B. Bluish discoloration of vagina:** This is **Chadwick’s sign**. It is a result of increased venous congestion in the pelvic mucosa. A similar bluish discoloration of the cervix is called **Jacquemier’s sign**. * **D. The first noticeable fetal movements:** This is known as **Quickening**. It typically occurs around 18–20 weeks in primigravida and 16–18 weeks in multigravida. **High-Yield Clinical Pearls for NEET-PG:** * **Goodell’s Sign:** Softening of the cervix (feels like the lips instead of the tip of the nose), usually seen at 6 weeks. * **Piskacek’s Sign:** Asymmetrical enlargement of the uterus if implantation occurs near one of the cornua. * **Palmer’s Sign:** Regular, rhythmic uterine contractions felt during a pelvic examination in early pregnancy (4–8 weeks). * **Osiander’s Sign:** Increased pulsation felt through the lateral vaginal fornices due to increased vascularity.

Question 139: What percentage of women deliver on their expected date of delivery?

A. 4% (Correct Answer)
B. 15%
C. 35%
D. 70%

Explanation: **Explanation:** The **Expected Date of Delivery (EDD)** is calculated using Naegele’s rule (LMP + 7 days - 3 months), assuming a standard 280-day (40-week) gestation. However, human gestation is variable. Statistically, only **4%** of women deliver exactly on their calculated EDD. The majority of "term" deliveries occur within a window of 37 to 42 weeks, with approximately 80% of women delivering within 10 days (before or after) of their due date. **Analysis of Options:** * **A (4%):** Correct. This is a classic obstetric statistic. While the EDD serves as a vital clinical landmark for scheduling scans and interventions, it is an estimate rather than a precise prediction. * **B (15%):** Incorrect. This figure is too high for a single specific day, though it may approximate the percentage of women who deliver in a specific peak week (like week 40). * **C & D (35% & 70%):** Incorrect. These values are far too high. While approximately 70-80% of women deliver during the "term" period (37–42 weeks), they do not deliver on the specific EDD. **NEET-PG High-Yield Pearls:** * **Naegele’s Rule:** LMP + 9 months + 7 days (or LMP - 3 months + 7 days). This assumes a 28-day cycle; if the cycle is longer, add the extra days. * **Most Accurate Dating:** Crown-Rump Length (CRL) via ultrasound in the first trimester (6–13 weeks) is the gold standard for dating, with a margin of error of ±3–5 days. * **Term Definition:** A pregnancy is considered "Full Term" between 39 weeks 0 days and 40 weeks 6 days. Delivery before 37 weeks is "Preterm," and after 42 weeks is "Post-term."

Question 140: Weight gain in pregnancy is related to all of the following factors except?

A. Ethnicity
B. Smoking (Correct Answer)
C. Socioeconomic status
D. Preconceptional weight

Explanation: **Explanation:** The total weight gain during pregnancy is influenced by maternal physiology, pre-existing health status, and environmental factors. The correct answer is **Smoking**, as it is a behavioral factor that typically leads to **decreased** weight gain or fetal growth restriction, but it is not a physiological determinant used to calculate or predict recommended weight gain targets. * **Why Smoking is the exception:** While smoking significantly impacts fetal birth weight (often causing IUGR), it is not a factor used to categorize or determine the *recommended* range of gestational weight gain. In fact, smokers often have lower pre-pregnancy BMIs and may gain less weight due to the metabolic effects of nicotine, but it is considered a modifiable risk factor rather than a demographic or physiological determinant. * **Preconceptional weight (Option D):** This is the **most important** determinant. The Institute of Medicine (IOM) guidelines base recommended weight gain entirely on the pre-pregnancy BMI (e.g., underweight women need to gain more, obese women less). * **Ethnicity (Option A):** Studies show variations in weight gain patterns across different ethnic groups due to genetic predispositions and cultural dietary habits. * **Socioeconomic status (Option C):** SES influences nutritional intake, access to prenatal care, and physical activity levels, all of which directly correlate with maternal weight gain. **Clinical Pearls for NEET-PG:** * **IOM Guidelines for Singleton Pregnancy:** * Normal BMI (18.5–24.9): Gain **11.5–16 kg**. * Underweight (<18.5): Gain **12.5–18 kg**. * Overweight (25–29.9): Gain **7–11.5 kg**. * Obese (>30): Gain **5–9 kg**. * The average weight gain in a healthy pregnancy is approximately **11 kg**. * Weight gain is minimal in the 1st trimester (~1–2 kg) and most rapid in the 2nd and 3rd trimesters (~0.4 kg/week).

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

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Antenatal Complications Management

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Psychosocial Aspects of Pregnancy

Practice Questions

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