High-Risk Pregnancy Identification — MCQs
All of the following statements are true regarding non-invasive prenatal screening (NIPT) test except:
Which of the following is not a high-risk pregnancy?
A 29-year-old G3P2 woman at 34 weeks' gestation is involved in a serious car accident, loses consciousness briefly, and presents to the emergency department awake and alert with a severe headache, abdominal, and pelvic pain. Her vital signs include a blood pressure of 150/90 mm Hg, heart rate of 120/min, temperature of 37.4°C (99.3°F), and respiratory rate of 22/min. Fetal heart rate is 155/min. Physical examination reveals minor bruises on the abdomen and limbs, blood in the vault upon vaginal inspection, and strong, frequent uterine contractions. Which of the following is most likely a complication of her current condition?
Which of the following is a criterion for infant at risk?
Which of the following statements about screening for chlamydia and gonorrhea is MOST accurate?
Which of the following antenatal complications may cause placentomegaly?
Which of the following is not associated with maternal age?
The number of maternal deaths per 100,000 live births is called-
Which of the following interventions has the STRONGEST evidence for reducing the risk of preeclampsia in high-risk pregnant women?
What maternal condition is commonly associated with congenital heart defects in the fetus?
High-Risk Pregnancy Identification Indian Medical PG Practice Questions and MCQs
Question 1: All of the following statements are true regarding non-invasive prenatal screening (NIPT) test except:
- A. High negative predictive value
- B. Positive test needs further confirmation
- C. Used in screening for aneuploidies
- D. Evaluates fetal blood taken by cordocentesis for fetal abnormalities (Correct Answer)
Explanation: ***Evaluates fetal blood taken by cordocentesis for fetal abnormalities*** - NIPT evaluates **cell-free fetal DNA** from a maternal blood sample, not fetal blood obtained via cordocentesis. - **Cordocentesis** is an invasive diagnostic procedure used to obtain fetal blood, typically for rapid karyotyping or hematologic studies, and is not part of NIPT. *Positive test needs further confirmation* - NIPT is a **screening test**, and a positive result indicates an increased risk, not a definitive diagnosis. - Any positive NIPT result requires **confirmatory diagnostic testing**, such as amniocentesis or chorionic villus sampling (CVS), due to the possibility of false positives. *High negative predictive value* - NIPT has a **very high negative predictive value (NPV)**, meaning that a negative result reliably indicates a very low likelihood of the screened aneuploidies being present. - This high NPV makes NIPT an effective tool for **reassuring patients** with negative results and reducing the need for invasive diagnostic procedures. *Used in screening for aneuploidies* - NIPT is primarily used to screen for common **fetal aneuploidies**, such as **Trisomy 21 (Down syndrome)**, Trisomy 18 (Edwards syndrome), and Trisomy 13 (Patau syndrome). - It analyzes fragments of fetal DNA circulating in the maternal bloodstream to detect chromosomal dosage imbalances.
Question 2: Which of the following is not a high-risk pregnancy?
- A. Age 25-30 years (Correct Answer)
- B. Diabetes mellitus
- C. Previous history of manual removal of placenta
- D. Anemia
Explanation: ***Age 25-30 years*** - An age of **25-30 years** is generally considered the optimal reproductive age range, and pregnancies within this bracket are typically classified as low-risk based on age alone. - This age range carries the lowest statistical risk for both maternal and fetal complications, assuming no other co-morbidities. *Previous history of manual removal of placenta* - A previous history of manual removal of the placenta indicates a risk factor for **recurrent placental retention** or **morbidly adherent placenta** in future pregnancies, making it a high-risk factor. - This history suggests an increased likelihood of complications such as **postpartum hemorrhage** and can influence the management of subsequent deliveries. *Anemia* - **Anemia** in pregnancy, especially severe iron deficiency anemia, is considered a high-risk factor due to increased maternal and fetal morbidity. - It can lead to complications such as **preterm delivery**, **low birth weight**, and difficulties tolerating blood loss during delivery. *Diabetes mellitus* - **Diabetes mellitus**, whether pre-existing or gestational, makes a pregnancy high-risk due to potential adverse effects on both the mother and the fetus. - Risks include **preeclampsia**, **macrosomia**, **neonatal hypoglycemia**, and **congenital anomalies**.
Question 3: A 29-year-old G3P2 woman at 34 weeks' gestation is involved in a serious car accident, loses consciousness briefly, and presents to the emergency department awake and alert with a severe headache, abdominal, and pelvic pain. Her vital signs include a blood pressure of 150/90 mm Hg, heart rate of 120/min, temperature of 37.4°C (99.3°F), and respiratory rate of 22/min. Fetal heart rate is 155/min. Physical examination reveals minor bruises on the abdomen and limbs, blood in the vault upon vaginal inspection, and strong, frequent uterine contractions. Which of the following is most likely a complication of her current condition?
- A. IUGR
- B. Subarachnoid hemorrhage
- C. Vasa previa
- D. DIC (Correct Answer)
Explanation: ***DIC*** - The combination of **abruptio placentae** (suggested by trauma, pain, vaginal bleeding, and contractions) with potential severe bleeding from uterine rupture or injury from the car accident, significantly increases the risk of **Disseminated Intravascular Coagulation (DIC)**. - **DIC** is a life-threatening condition initiated by massive activation of the coagulation system, leading to widespread microthrombi formation and subsequent consumption of clotting factors and platelets, resulting in simultaneous **bleeding and thrombosis**. *IUGR* - **Intrauterine Growth Restriction (IUGR)** is a chronic complication typically developing over weeks or months, caused by placental insufficiency or fetal conditions. - It is unlikely to be an acute complication directly resulting from a traumatic event at 34 weeks gestation. *Subarachnoid hemorrhage* - While trauma can cause **subarachnoid hemorrhage**, the primary obstetric complications described (abdominal pain, vaginal bleeding, uterine contractions following trauma) point more strongly towards placental or uterine injury. - The patient's **headache** and brief loss of consciousness could be due to concussion, but the obstetric findings are more immediately concerning for distinct complications. *Vasa previa* - **Vasa previa** is an anatomical anomaly where fetal blood vessels within the membranes cross the internal cervical os, unprotected by placental tissue or Wharton's jelly. - This condition presents with painless vaginal bleeding upon rupture of membranes and **fetal distress**, usually in labor, but is not directly caused by trauma.
Question 4: Which of the following is a criterion for infant at risk?
- A. Preeclampsia in pregnancy (Correct Answer)
- B. Has not taken 100 days folic acid
- C. Malpresentation during birth
- D. Working mothers
Explanation: ***Preeclampsia in pregnancy*** - **Preeclampsia** is a serious pregnancy complication characterized by high blood pressure and signs of damage to another organ system, most often the liver and kidneys. - Infants born to mothers with preeclampsia are at **significantly higher risk** for complications including **preterm birth**, **intrauterine growth restriction (IUGR)**, low birth weight, respiratory distress syndrome, and perinatal mortality. - This is a **universally recognized criterion** for identifying high-risk infants in maternal-child health programs and NICU protocols. - Such infants require close monitoring and specialized care from birth. *Has not taken 100 days folic acid* - Periconceptional **folic acid supplementation** (ideally starting 3 months before conception and continuing through early pregnancy) reduces the risk of **neural tube defects** in the fetus. - While lack of folic acid supplementation increases the risk of congenital anomalies during pregnancy, this historical factor alone does not classify the infant as "at risk" after birth unless an actual neural tube defect or other complication is present. - This is primarily a **pregnancy risk factor** rather than a postnatal infant risk criterion. *Malpresentation during birth* - **Malpresentation** (e.g., breech, transverse lie, face presentation) increases the risk of birth complications such as **birth asphyxia**, **birth trauma**, cord prolapse, and difficult delivery. - While malpresentation is recognized as a risk factor during delivery and such infants may require closer initial monitoring, **preeclampsia** represents a more comprehensive and persistent risk affecting multiple organ systems and long-term outcomes. - In the context of identifying high-risk infants for follow-up programs, maternal preeclampsia is a more significant criterion than malpresentation alone (assuming no birth complications occurred). *Working mothers* - A mother's employment status does not inherently classify an infant as "at risk" from a medical or developmental standpoint. - While **socioeconomic factors** and access to care can impact infant health, simply being a working mother is not a direct medical criterion for defining an infant as high-risk.
Question 5: Which of the following statements about screening for chlamydia and gonorrhea is MOST accurate?
- A. Screening is not cost-effective and should be avoided in low-risk populations
- B. Screening is recommended for sexually active women under 25, men who have sex with men, and pregnant women (Correct Answer)
- C. Screening is only recommended for patients with symptoms
- D. Annual screening is recommended for all sexually active adults regardless of age or risk factors
Explanation: ***Screening is recommended for sexually active women under 25, men who have sex with men, and pregnant women*** - This statement aligns with current **CDC guidelines** which prioritize screening in populations with a higher prevalence or increased risk of complications from chlamydia and gonorrhea. - Early detection and treatment in these groups can prevent serious long-term health consequences like **pelvic inflammatory disease (PID)**, **infertility**, and **adverse pregnancy outcomes**. *Screening is not cost-effective and should be avoided in low-risk populations* - While screening in genuinely low-risk populations might be less cost-effective, chlamydia and gonorrhea often have **asymptomatic presentations**, making targeted screening essential for disease control. - The long-term costs associated with untreated infections (e.g., infertility treatment, chronic pain) often outweigh the costs of screening, even in lower-prevalence settings, when focused on at-risk groups. *Screening is only recommended for patients with symptoms* - This statement is incorrect because a significant proportion of chlamydia and gonorrhea infections are **asymptomatic**, meaning individuals can be infected and transmit the infection without showing any symptoms. - Relying only on symptoms would lead to widespread **undetected infections** and continued transmission within communities. *Annual screening is recommended for all sexually active adults regardless of age or risk factors* - While broad screening might seem comprehensive, current guidelines emphasize **targeted screening** based on age, sexual history, and risk factors to optimize resource allocation and maximize public health impact. - Overly broad screening in genuinely low-risk older populations may not be the most **cost-effective strategy**.
Question 6: Which of the following antenatal complications may cause placentomegaly?
- A. Diabetes (Correct Answer)
- B. Abruption
- C. HIV
- D. Hypertension
Explanation: ***Diabetes*** - Maternal **diabetes** (both pre-existing and gestational) is the **most common antenatal complication** causing **placentomegaly** (increased placental weight). - Mechanisms include **villous edema**, **increased cellularity** (hyperplasia), **chorangiosis**, and **vasculopathy**, which are compensatory responses to altered nutrient transfer and chronic hyperglycemia. - The placenta may appear **large, thick, and boggy** in diabetic pregnancies, reflecting chronic metabolic stress and inflammation. *Hypertension* - **Hypertension** (especially chronic hypertension or pre-eclampsia) is typically associated with **smaller, infarcted placentas** rather than placentomegaly, due to impaired uteroplacental blood flow and ischemia. - Conditions like **pre-eclampsia** lead to **placental insufficiency**, infarctions, and often fetal growth restriction—the opposite of placentomegaly. *Abruption* - **Placental abruption** is the premature separation of the placenta from the uterine wall characterized by **retroplacental hemorrhage**, not an increase in placental size. - While abruption creates a **retroplacental hematoma**, this is a localized hemorrhagic event and does not cause generalized placentomegaly (increased placental parenchymal mass). *HIV* - **HIV infection** in pregnancy is **not a typical cause of placentomegaly** among the options listed, though chronic **placental villitis** can occasionally increase placental mass. - However, compared to diabetes, HIV is a **far less common** and less clinically significant cause of placentomegaly. - The primary placental concerns with HIV are **vertical transmission risk** and inflammatory changes, not placental enlargement.
Question 7: Which of the following is not associated with maternal age?
- A. Preterm labour
- B. Aneuploidy
- C. Hydatidiform mole
- D. Post maturity (Correct Answer)
Explanation: ***Post maturity*** - **Post-maturity** (post-term pregnancy, >42 weeks) does NOT have a consistent or strong association with maternal age in current obstetric literature. - While some older studies suggested associations, modern evidence shows **no significant independent effect of maternal age** on post-term pregnancy rates. - Post-term pregnancy is more related to factors like **first pregnancy**, **prior post-term delivery**, and **fetal sex** (males more common). *Preterm labour* - **Preterm birth is strongly associated with maternal age**, particularly at both extremes: - **Teenage mothers** (<20 years): Increased risk due to biological immaturity and socioeconomic factors - **Advanced maternal age** (≥35 years): Increased risk due to higher rates of maternal complications (hypertension, diabetes) and placental dysfunction - This is well-established in obstetric literature and clinical guidelines. *Aneuploidy* - The risk of **aneuploidy**, particularly **Down syndrome (Trisomy 21)**, **increases dramatically with advancing maternal age**. - At age 35: ~1/350 risk; at age 40: ~1/100 risk; at age 45: ~1/30 risk - Due to age-related decline in oocyte quality causing meiotic errors during egg formation. *Hydatidiform mole* - **Gestational trophoblastic disease** (hydatidiform mole) is strongly associated with **extremes of maternal age**: - **Women >40 years**: 5-10 fold increased risk - **Teenagers**: 1.5-2 fold increased risk - Related to abnormal fertilization events more common at age extremes.
Question 8: The number of maternal deaths per 100,000 live births is called-
- A. Maternal mortality rate
- B. Maternal mortality ratio (Correct Answer)
- C. Infant mortality rate
- D. Perinatal mortality rate
Explanation: ***Maternal mortality ratio*** - This is the standard epidemiological indicator defining the number of **maternal deaths per 100,000 live births**. - It measures the risk of death due to pregnancy in a population. *Maternal mortality rate* - This term is often used interchangeably with maternal mortality ratio, but technically, a **rate usually includes time in the denominator** (e.g., deaths per person-year). - While related to maternal mortality, it's not the precise term for deaths per live births. *Infant mortality rate* - This measures the number of **deaths of infants under one year of age per 1,000 live births**. - It does not specifically refer to deaths of mothers. *Perinatal mortality rate* - This calculates the number of **stillbirths and deaths in the first week of life per 1,000 total births** (live births plus stillbirths). - It focuses on deaths around the time of birth in the infant, not the mother.
Question 9: Which of the following interventions has the STRONGEST evidence for reducing the risk of preeclampsia in high-risk pregnant women?
- A. Smoking cessation
- B. Low-dose aspirin (75-150 mg daily) (Correct Answer)
- C. Calcium supplementation (1.5-2g daily)
- D. Regular blood pressure monitoring
Explanation: ***Low-dose aspirin (75-150 mg daily)*** - **Low-dose aspirin** started before 16 weeks of gestation is the **only intervention with robust evidence** for reducing preeclampsia risk in high-risk women (ACOG, WHO, USPSTF recommendations). - Meta-analyses show **17-25% relative risk reduction** in preeclampsia when started early in pregnancy. - Recommended for women with history of preeclampsia, chronic hypertension, diabetes, kidney disease, or multifetal gestation. - Acts by **improving placental perfusion** and reducing thromboxane-mediated vasoconstriction. *Calcium supplementation (1.5-2g daily)* - **Calcium supplementation** shows benefit in **populations with low dietary calcium intake** (typically <600 mg/day). - Less effective in populations with adequate baseline calcium intake (most developed countries). - **WHO recommends** calcium for women in low-calcium settings but **not as first-line** in general high-risk populations. *Smoking cessation* - **Essential for healthy pregnancy** and reduces risks of placental abruption, preterm birth, and IUGR. - While smoking is associated with adverse outcomes, **cessation has not been proven to directly prevent preeclampsia**. - Some studies paradoxically show lower preeclampsia rates in smokers (confounded by lower PlGF levels), but smoking increases overall maternal-fetal morbidity. *Regular blood pressure monitoring* - **Critical for early detection** and management of hypertensive disorders but **does not prevent** their occurrence. - Allows timely intervention to **prevent progression to severe disease** and eclampsia. - Part of routine antenatal care but is a **surveillance measure, not a preventive intervention**.
Question 10: What maternal condition is commonly associated with congenital heart defects in the fetus?
- A. ACE inhibitor
- B. GDM
- C. Pregestational DM (Correct Answer)
- D. Valproate
Explanation: ***Pregestational DM*** - **Pre-existing diabetes** in the mother is a significant risk factor for various **congenital anomalies**, including **congenital heart defects**, due to suboptimal glycemic control during early embryogenesis. - Poorly controlled **maternal hyperglycemia** leads to increased oxidative stress and altered cellular metabolism in the developing fetus, impacting cardiovascular development. *ACE inhibitor* - **ACE inhibitors** are teratogenic, primarily causing **renal dysfunction** (e.g., renal tubular dysplasia, oligohydramnios, anuria) and **fetal growth restriction**, especially when used in the second and third trimesters. - While they can have adverse fetal effects, their association with **congenital heart defects** is less pronounced compared to other teratogenic exposures. *GDM* - **Gestational diabetes mellitus (GDM)** typically develops in the second or third trimester when major organogenesis is complete, making its association with **structural congenital anomalies**, including heart defects, significantly lower than pregestational diabetes. - GDM is more commonly associated with fetal **macrosomia**, **hypoglycemia**, and respiratory distress syndrome at birth. *Valproate* - **Valproate** is a known teratogen associated with a specific pattern of anomalies, most notably **neural tube defects** (e.g., spina bifida), and facial dysmorphisms. - While it can be associated with an increased risk of some congenital heart defects, its primary and most significant fetal risk is **neural tube defects**.
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