Prenatal Care Practice Questions

Q: A grand multipara is defined as a woman who has had how many viable pregnancies (≥20 weeks):

>=5. ***>=5*** - A **grand multipara** is defined as a woman who has delivered **five or more** viable fetuses (live births or stillbirths after 20 weeks of gestation). - This classification is important clinically due to the increased risks associated with grand multiparity, such as **postpartum hemorrhage** and complications during labor. *>2* - This definition is too broad, as a woman with 3 or 4 live births is considered a **multipara**, but not specifically a grand multipara. - The term **multipara** generally applies to women who have had two or more live births. *>3* - This definition includes women with 4 live births, who are considered **multipara** but do not meet the stricter criteria for **grand multipara**. - The term **grand multipara** specifically denotes a higher number of deliveries with associated increased obstetric risks. *>4* - While close, this definition would include a woman with 5 live births, but it does not specify "five or more." - The precise definition of a **grand multipara** is five or more, which carries specific clinical implications for pregnancy management.

Q: A lady with 12-week pregnancy presents with bleeding. On examination, vagina is normal, internal os is closed, and USG shows fetal viability with fundal height of 13 weeks. What is the diagnosis?

Threatened abortion. ***Threatened abortion*** - This diagnosis is characterized by **vaginal bleeding** in the first half of pregnancy with a **closed internal os** and evidence of fetal viability on ultrasound. - The fundal height being consistent with gestational age also indicates ongoing pregnancy, despite the bleeding. *Inevitable abortion* - This condition is indicated by vaginal bleeding accompanied by a **dilated cervix (open internal os)**, suggesting that the pregnancy cannot be salvaged. - While bleeding is present, the **closed internal os** in the given scenario rules out inevitable abortion. *Incomplete abortion* - This involves vaginal bleeding, an **open internal os**, and the **partial expulsion of pregnancy tissue**, with some products of conception remaining in the uterus. - The presentation does not include an open os or retained products of conception, as the fetus is viable and the os is closed. *Complete abortion* - This occurs when **all products of conception have been expelled** from the uterus, characterized by an initially open os that subsequently closes, and often a decrease in bleeding. - The presence of a **viable fetus** and a closed os clearly rules out a complete abortion.

Q: EDD ( Expected Date of Delivery) is calculated by:

Naegele's formula. ***Naegele's formula*** - **Naegele's formula** is the most common and widely accepted method for calculating the estimated date of delivery (EDD). - It involves adding one year, subtracting three months, and adding seven days to the **first day of the last menstrual period (LMP)**. *Cardiff Formula* - The **Cardiff Formula** is a method used for assessing fetal movements, particularly for monitoring fetal well-being, not for calculating EDD. - It establishes a baseline of fetal movements over a specific period to detect any significant decrease. *McDonald's rule* - **McDonald's rule** is a clinical method used to estimate the gestational age based on fundal height measurements. - While it helps in estimating gestational age, it is not primarily used for calculating the precise EDD. *Hadlock Formula* - The **Hadlock Formula** refers to a set of widely used ultrasound-based formulas for estimating fetal weight and gestational age, typically involving biometry measurements like BPD, HC, AC, and FL. - While accurate for gestational age estimation, it's an imaging-based method, not a direct calculation of EDD from the LMP like Naegele's.

Q: What is the Triple screen test (Triple marker test)?

HCG + AFP + Unconjugated Estriol. ***HCG + AFP + Unconjugated Estriol*** - A BA test, more commonly known as the **triple screen**, measures **human chorionic gonadotropin (HCG)**, **alpha-fetoprotein (AFP)**, and **unconjugated estriol (uE3)**. - This prenatal screening test is used to assess the risk of certain **chromosomal abnormalities** (like Down syndrome) and **neural tube defects** during pregnancy. *AFP + Uric acid + LDH* - This combination of markers is **not a standard prenatal screening test** for chromosomal abnormalities; **uric acid** and **LDH (lactate dehydrogenase)** are general markers for liver damage or cell turnover. - While **AFP** is part of prenatal screening, its combination with **uric acid** and **LDH** does not constitute the BA test. *HCG + AFP + PAPP-A* - This combination represents components of the **first-trimester combined test**, specifically **HCG**, **AFP** (though typically used in the second trimester), and **Pregnancy-Associated Plasma Protein-A (PAPP-A)**. - While useful for prenatal screening, the BA test (triple screen) specifically includes **unconjugated estriol** rather than PAPP-A in the primary second-trimester panel. *HCG + AFP + Placental alkaline phosphatase* - While **HCG** and **AFP** are part of prenatal screening, **placental alkaline phosphatase** is **not a standard component** of the BA test (triple screen). - Placental alkaline phosphatase can be elevated in various conditions but is not routinely measured for the same purposes as unconjugated estriol in prenatal screening.

Q: Which of the following is the MOST accurate test for detecting neural tube defects?

USG. ***USG (Ultrasound)*** - **High-resolution ultrasound** is the **gold standard and most accurate imaging modality** for detecting **neural tube defects (NTDs)** due to its ability to directly visualize anatomical structures of the fetus. - **Diagnostic accuracy**: Detection rate >95% for anencephaly and 80-90% for open spina bifida with targeted anomaly scan at 18-20 weeks. - Can identify specific features such as **lemon sign** (frontal bone scalloping), **banana sign** (cerebellar compression), direct visualization of **spina bifida**, **anencephaly**, or **encephalocele**. - **Non-invasive, safe, and widely available**, making it the primary diagnostic tool in clinical practice. *Amniocentesis* - **Amniocentesis** measures **alpha-fetoprotein (AFP)** and **acetylcholinesterase (AChE)** in amniotic fluid, which are elevated in open NTDs. - While highly accurate as a **confirmatory test** (near 99% sensitivity with both markers), it is **invasive** with risk of miscarriage (0.1-0.3%). - Used primarily when ultrasound findings are **equivocal** or for **biochemical confirmation**, not as the first-line diagnostic test. - In modern practice, ultrasound has largely replaced amniocentesis for NTD diagnosis due to superior imaging technology. *Chromosomal analysis* - **Chromosomal analysis** (karyotyping) detects **chromosomal abnormalities** like trisomies (Down syndrome, Edwards syndrome). - NTDs are **structural malformations**, not chromosomal abnormalities, though some chromosomal disorders may have associated structural defects. - Does not directly diagnose NTDs. *Placentography* - **Placentography** is used to localize the **placenta** in cases of suspected **placenta previa** or for guiding invasive procedures. - Provides no information about **fetal anatomy** and is not used for detecting NTDs.

Q: Internationally accepted definition of abortion is the expulsion of the products of conception:

Before 20th week of gestation or 500 gms (weight of foetus). ***Before 20th week of gestation or 500 gms (weight of foetus)*** - The internationally accepted definition of abortion, as per organizations like the **World Health Organization (WHO)**, is the expulsion of products of conception before **20 weeks of gestation** or when the fetal weight is less than **500 grams**. - This threshold is used because fetuses weighing less than 500 grams or born before 20 weeks are generally considered non-viable, meaning they have a negligible chance of survival outside the womb. *Before 28th week of gestation or 1 kg (weight of foetus)* - While 28 weeks of gestation is an important milestone for fetal viability, defining abortion at this stage would include many late preterm births that are often viable. - A fetal weight of **1 kg (1000g)** is generally associated with a much higher probability of survival, signifying a preterm birth rather than an abortion by international standards. *Before 20 week of gestation or 750 gms (weight of foetus)* - The gestational age of **20 weeks** is correct, but a fetal weight of **750 grams** is higher than the internationally accepted cutoff of 500 grams for defining abortion. - Fetuses at 750 grams, especially at 20 weeks, are still considered non-viable, but the weight criterion in this option is not the standard international definition. *Before 24th week of gestation or 750 gms (weight of foetus)* - While **24 weeks of gestation** is often considered the threshold of viability in many countries, and is used in some legal definitions, it is not the internationally recognized standard for abortion, which generally uses 20 weeks. - A fetal weight of **750 grams** at 24 weeks would indicate a very early preterm birth with a low but possible chance of survival, whereas the international definition of abortion focuses on absolute non-viability.

Q: Which is the best marker for NTD?

AFP. ***AFP*** - **Alpha-fetoprotein (AFP)** is the primary and most widely used biochemical marker for detecting **neural tube defects (NTDs)** during pregnancy. - Elevated levels of **AFP in maternal serum** or amniotic fluid are indicative of an open NTD, such as **spina bifida** or **anencephaly**, where fetal blood leaks into the amniotic fluid. *Inhibin-A* - **Inhibin-A** is typically used in the **quad screen** as a marker for **Down syndrome (Trisomy 21)**, where its levels are typically elevated. - It does not serve as a primary marker for the detection of neural tube defects. *hCG* - **Human Chorionic Gonadotropin (hCG)** is elevated in **Down syndrome** and decreased in **Edwards syndrome (Trisomy 18)** screening. - It is not a reliable marker for the diagnosis of neural tube defects. *Pseudocholinesterase* - **Pseudocholinesterase**, also known as butyrylcholinesterase, is a serum enzyme that can be **elevated in amniotic fluid** in cases of open NTDs. - While it can be a useful confirmatory test, its general utility as a primary marker is less than AFP, as it is less specific and more difficult to implement in routine screening.

Q: All of the following conditions are risk factors for urinary tract infections in pregnancy except:

Hypertension. ***Hypertension*** - While hypertension is a significant pregnancy complication, it is **not directly a risk factor** for developing urinary tract infections. - Its presence does not inherently increase the susceptibility of the urinary tract to bacterial colonization or infection. *Vesicoureteral reflux* - This condition involves the **backward flow of urine** from the bladder into the ureters, sometimes reaching the kidneys. - It creates a reservoir for bacteria and facilitates their ascent, significantly increasing the risk of UTIs during pregnancy. *Diabetes* - Women with diabetes are more prone to UTIs due to **glycosuria** (glucose in urine), which serves as a bacterial growth medium. - Additionally, diabetic neuropathy can lead to **incomplete bladder emptying**, further increasing UTI risk. *Sickle cell anemia* - Patients with sickle cell anemia can experience **renal papillary necrosis** and impaired renal function, which can predispose them to UTIs. - They also tend to have a **compromised immune system**, making them more susceptible to infections in general, including UTIs.

Q: The following changes occur in the urinary system in pregnancy except:

Increased activity of ureters. ***Increased activity of ureters*** - Ureters actually experience **decreased peristaltic activity** and **dilation** during pregnancy due to hormonal influences (progesterone) and mechanical compression. - This leads to **urinary stasis** and an increased risk of urinary tract infections, a common complication of pregnancy. *Increased RBF* - **Renal blood flow (RBF)** significantly **increases** during pregnancy, primarily due to vasodilation induced by hormones like relaxin and nitric oxide. - This increase in RBF is essential to accommodate the increased metabolic demands and waste product excretion during pregnancy. *Increased GFR* - **Glomerular filtration rate (GFR)** also **increases** by 30-50% during pregnancy, reflecting the increased RBF and the need to filter a larger volume of plasma. - This elevated GFR can lead to lower serum creatinine and urea levels compared to the non-pregnant state. *Hypertrophy of bladder musculature* - The **bladder musculature undergoes hypertrophy** during pregnancy as a physiological adaptation to accommodate the growing uterus and maintain bladder function. - This hypertrophy helps the bladder withstand increased pressure and prepare for the demands of labor and delivery.

Q: Most commonly used sonological indicator for aneuploidy in first trimester is:

Nuchal translucency. ***Nuchal translucency*** - **Nuchal translucency (NT)** is the most common and established sonographic marker for **Down syndrome** and other aneuploidies in the first trimester. - Increased NT thickness is directly correlated with a higher risk of **chromosomal abnormalities** and congenital heart defects. *Gestational sac volume* - **Gestational sac volume** is primarily used to assess the viability and proper development of the early pregnancy, not as a direct marker for aneuploidy. - Abnormalities in gestational sac size can indicate a **non-viable pregnancy** or **blighted ovum**, but not specific chromosomal defects. *Serum PAPP-A level* - **Serum PAPP-A (pregnancy-associated plasma protein-A)** is a biochemical marker used in conjunction with NT in first-trimester screening. - While it is part of aneuploidy risk assessment, **PAPP-A is a blood test**, not a sonological indicator itself. *Crown-rump length* - **Crown-rump length (CRL)** is used for **accurate dating of pregnancy** in the first trimester. - While an abnormal CRL can sometimes be associated with adverse pregnancy outcomes, it is not a direct or primary sonological indicator for aneuploidy screening.

Question 1

A grand multipara is defined as a woman who has had how many viable pregnancies (≥20 weeks):

Accepted Answer

>=5

Answer

>2

Answer

>3

Answer

>4

Question 2

A lady with 12-week pregnancy presents with bleeding. On examination, vagina is normal, internal os is closed, and USG shows fetal viability with fundal height of 13 weeks. What is the diagnosis?

Accepted Answer

Threatened abortion

Answer

Incomplete abortion

Answer

Complete abortion

Answer

Inevitable abortion

Question 3

EDD ( Expected Date of Delivery) is calculated by:

Accepted Answer

Naegele's formula

Answer

Cardiff Formula

Answer

McDonald's rule

Answer

Hadlock Formula

Question 4

What is the Triple screen test (Triple marker test)?

Accepted Answer

HCG + AFP + Unconjugated Estriol

Answer

HCG + AFP + PAPP-A

Answer

AFP + Uric acid + LDH

Answer

HCG + AFP + Placental alkaline phosphatase

Question 5

Which of the following is the MOST accurate test for detecting neural tube defects?

Accepted Answer

USG

Answer

Placentography

Answer

Chromosomal analysis

Answer

Amniocentesis

Question 6

Internationally accepted definition of abortion is the expulsion of the products of conception:

Accepted Answer

Before 20th week of gestation or 500 gms (weight of foetus)

Answer

Before 28th week of gestation or 1 kg (weight of foetus)

Answer

Before 24th week of gestation or 750 gms (weight of foetus)

Answer

Before 20th week of gestation or 750 gms (weight of foetus)

Question 7

Which is the best marker for NTD?

Accepted Answer

AFP

Answer

Inhibin-A

Answer

hCG

Answer

Pseudocholinesterase

Question 8

All of the following conditions are risk factors for urinary tract infections in pregnancy except:

Accepted Answer

Hypertension

Answer

Vesicoureteral reflux

Answer

Diabetes

Answer

Sickle cell anemia

Question 9

The following changes occur in the urinary system in pregnancy except:

Accepted Answer

Increased activity of ureters

Answer

Increased RBF

Answer

Increased GFR

Answer

Hypertrophy of bladder musculature

Question 10

Most commonly used sonological indicator for aneuploidy in first trimester is:

Accepted Answer

Nuchal translucency

Answer

Gestational sac volume

Answer

Serum PAPP-A level

Answer

Crown-rump length

Prenatal Care — MCQs

Prenatal Care — MCQs

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