Ethics of Prenatal Diagnosis and Intervention — MCQs
All of the following statements are true regarding non-invasive prenatal screening (NIPT) test except:
In the context of Indian regulations, what is the minimum number of Medical Termination of Pregnancy (MTP) cases a doctor must have performed to be eligible to perform an MTP?
Which of the following are individual indicators of fetal distress?
According to MTP Act, 2 doctors' opinion is required when pregnancy is:
18 weeks pregnant female presents with no high risk of NTD and low risk of trisomy 21 on quad test. What is the most appropriate next step in management?
The image shows an ultrasound-guided procedure with a needle inserted into the umbilical cord. What is this procedure called?
A 14 years old rape victim with 22 weeks of gestation coming to hospital. All of the following can be done except:
What procedure is being demonstrated in the image?
After an initial pregnancy resulted in a spontaneous loss in the first trimester, your patient is concerned about the possibility of this recurring. What is the chance of recurrence?
Which of the following is NOT an indication for genetic counseling?
Ethics of Prenatal Diagnosis and Intervention 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: In the context of Indian regulations, what is the minimum number of Medical Termination of Pregnancy (MTP) cases a doctor must have performed to be eligible to perform an MTP?
- A. 10
- B. 15
- C. 25 (Correct Answer)
- D. 35
Explanation: ***25*** - As per the **MTP Act of India (1971)**, a registered medical practitioner needs to have assisted in or performed a minimum of **25 medical termination of pregnancies** in an approved training center to be certified to perform MTPs independently. - This regulation ensures a certain level of practical experience and competence before a doctor can perform this procedure. *10* - This number is **insufficient** according to Indian MTP regulations for a doctor to be eligible to perform MTPs independently. - The required practical experience is set higher to ensure adequate skill and safety for the procedure. *15* - This number also **falls short** of the minimum requirement stipulated by the Indian MTP Act. - The legislative framework emphasizes a more extensive practical exposure for practitioners. *35* - While performing 35 MTPs would certainly meet the experience requirement, it is **not the minimum specified** by the Indian MTP regulations. - The law requires a lower threshold of practical experience, which is 25 cases.
Question 3: Which of the following are individual indicators of fetal distress?
- A. Meconium staining
- B. Late deceleration of heart rate
- C. Decrease in fetal scalp blood pH
- D. All of the options (Correct Answer)
Explanation: ***All of the options*** - **Meconium staining** of the amniotic fluid, **late decelerations of fetal heart rate**, and a **decrease in fetal scalp blood pH** are all recognized individual indicators of fetal distress. - These signs individually or collectively suggest that the fetus is experiencing **hypoxia** or other adverse conditions. *Meconium staining* - Refers to the presence of **meconium** (the first stool of a newborn) in the **amniotic fluid**, which can indicate fetal stress leading to gasping and passage of meconium. - While concerning, it's not always indicative of severe hypoxia but warrants further assessment. - **Mechanism**: Fetal hypoxia → vagal stimulation → relaxation of anal sphincter → meconium passage. *Late deceleration of heart rate* - **Late decelerations** are symmetric drops in fetal heart rate that begin after the peak of the contraction and return to baseline after the contraction has ended. - They are associated with **uteroplacental insufficiency** and **fetal hypoxia**, reflecting inadequate oxygen delivery to the fetus. - **Significance**: Indicates fetal compromise requiring immediate evaluation and potential intervention. *Decrease in fetal scalp blood pH* - A **low fetal scalp blood pH** (typically below 7.20) indicates **fetal acidosis**, which is a direct sign of **fetal hypoxemia** and distress. - It suggests that the fetus is undergoing anaerobic metabolism due to insufficient oxygen supply. - **Clinical utility**: Provides objective biochemical evidence of fetal compromise when CTG is non-reassuring.
Question 4: According to MTP Act, 2 doctors' opinion is required when pregnancy is:
- A. 10 weeks
- B. 6 weeks
- C. > 12 weeks
- D. > 20 weeks (Correct Answer)
Explanation: ***> 20 weeks*** - According to the **MTP (Amendment) Act 2021**, two registered medical practitioners' opinions are required for terminating a pregnancy when its duration is **between 20 to 24 weeks** (for specific categories of women). - For pregnancies **beyond 24 weeks**, termination is only permitted in cases of substantial fetal abnormalities diagnosed by a Medical Board. - This is the **current legal requirement** under Indian law. *10 weeks* - For pregnancies **up to 20 weeks**, only **one registered medical practitioner's** opinion is required for termination. - At 10 weeks, the pregnancy is well within this limit, so only one doctor's opinion is needed. *6 weeks* - Similar to 10 weeks, a pregnancy at 6 weeks falls within the **20-week limit**. - Only **one registered medical practitioner's** opinion is required, not two. *> 12 weeks* - Under the **old MTP Act 1971**, two doctors' opinions were required for pregnancies beyond 12 weeks. - However, under the **current MTP (Amendment) Act 2021**, pregnancies between 12-20 weeks require only **one doctor's opinion**. - This option represents outdated legal requirements and is **incorrect** under current law.
Question 5: 18 weeks pregnant female presents with no high risk of NTD and low risk of trisomy 21 on quad test. What is the most appropriate next step in management?
- A. Repeat non-invasive screening test.
- B. Perform invasive diagnostic testing.
- C. Perform amniotic fluid analysis.
- D. Perform a detailed fetal ultrasound. (Correct Answer)
Explanation: ***Perform a detailed fetal ultrasound.*** - A **detailed fetal ultrasound** (often referred to as an **anatomy scan**) at around 18-22 weeks is a standard component of prenatal care for all pregnant women, regardless of screening test results. - This ultrasound evaluates fetal anatomy for structural anomalies, assesses fetal growth, and confirms gestational age, providing crucial information even with low-risk screening. *Repeat non-invasive screening test.* - Repeating a non-invasive screening test (like another quad screen or NIPT) is generally **not indicated** when initial results show a low risk and there are no other clinical concerns. - Such tests are primarily for screening purposes, and a second low-risk result would offer little additional actionable information, as their positive predictive value is low. *Perform invasive diagnostic testing.* - **Invasive diagnostic testing**, such as **amniocentesis** or **chorionic villus sampling (CVS)**, carries a risk of miscarriage and is reserved for situations with a high risk of chromosomal abnormalities or genetic conditions. - Given the low-risk quad screen results for trisomy 21 and no high risk for NTDs, invasive testing is **not warranted** at this stage. *Perform amniotic fluid analysis.* - **Amniotic fluid analysis** is part of an amniocentesis, an **invasive diagnostic procedure** designed to detect chromosomal abnormalities or genetic disorders. - This procedure is typically reserved for cases where screening tests indicate a high risk or there is a clinical suspicion of a genetic condition; it's **not a routine step** after a low-risk quad screen.
Question 6: The image shows an ultrasound-guided procedure with a needle inserted into the umbilical cord. What is this procedure called?
- A. PUBS (Correct Answer)
- B. Amniocentesis
- C. Chorionic villus sampling
- D. Fetal scalp sampling
Explanation: ***PUBS*** - The image clearly depicts a needle inserted into the **umbilical cord**, which is characteristic of **Percutaneous Umbilical Blood Sampling (PUBS)**. - **PUBS**, also known as cordocentesis, involves sampling fetal blood from the umbilical cord for diagnostic purposes. *Amniocentesis* - This procedure involves withdrawing **amnionic fluid** from the sac surrounding the fetus, not directly from the umbilical cord. - The needle in amniocentesis would typically be shown entering the amniotic sac to aspirate fluid, not targeting the umbilical vessel. *Chorionic villus sampling* - This involves taking a sample of **chorionic villi** from the placenta, usually earlier in pregnancy than shown in the image. - The depicted needle insertion is into the umbilical cord itself, not placental tissue. *Fetal scalp sampling* - This procedure is performed during labor to measure fetal **pH** by taking a small blood sample from the fetal scalp. - The image shows an antenatal procedure targeting the umbilical cord, not the fetal scalp during labor.
Question 7: A 14 years old rape victim with 22 weeks of gestation coming to hospital. All of the following can be done except:
- A. Male doctor can examine her with female attendant
- B. UPT not required
- C. Gynecologist can abort the fetus upon the patient request
- D. No need to collect vaginal swab (Correct Answer)
Explanation: ***No need to collect vaginal swab (INCORRECT STATEMENT - This CANNOT be said)*** - Collecting a **vaginal swab is MANDATORY** in all cases of sexual assault for **forensic evidence collection** to identify the perpetrator through DNA analysis. - This is a **medico-legal requirement** and must be done even if pregnancy has occurred, as it provides crucial evidence for prosecution. - The statement "no need to collect vaginal swab" is completely wrong, making it the correct answer to this "except" question. *Male doctor can examine her with female attendant (Can be done)* - It is **legally permissible and ethical** for a male doctor to examine a female patient in the presence of a **female attendant**. - This ensures patient comfort, privacy protection, and safeguards the doctor against false allegations. - This is standard medical practice in sensitive situations like sexual assault. *UPT not required (Can be done/said)* - A 14-year-old presenting with **22 weeks of gestation** has clinically evident pregnancy through abdominal examination and ultrasound. - Urine pregnancy test (UPT) is **not necessary** at this advanced gestational age as pregnancy is already confirmed. - Resources should focus on comprehensive care rather than redundant testing. *Gynecologist can abort the fetus upon the patient request (Can be done)* - Under the **Medical Termination of Pregnancy (MTP) Amendment Act 2021**, termination is permissible up to **24 weeks for rape survivors**. - For a minor, **consent of guardian** and opinion of **two registered medical practitioners** is required. - At 22 weeks, this patient is within the legal timeframe for termination given the circumstances of sexual assault.
Question 8: What procedure is being demonstrated in the image?
- A. Artificial rupture of membranes
- B. Fetal scalp pH monitoring
- C. Amniocentesis (Correct Answer)
- D. Paracervical block
Explanation: ***Amniocentesis*** - The image clearly depicts a needle being inserted through the maternal abdomen into the **amniotic sac** to withdraw **amniotic fluid**, which is the procedure for amniocentesis. - This procedure is typically performed for prenatal diagnosis of genetic conditions, **fetal lung maturity assessment**, or to evaluate for uterine infections. *Artificial rupture of membranes* - This procedure involves using a specialized instrument (amniohook) to **break the amniotic sac** through the cervix during active labor to facilitate delivery, which is not what is shown. - The image shows an abdominal approach and aspiration of fluid, not membrane rupture through the vagina. *Fetal scalp pH monitoring* - Fetal scalp pH monitoring involves taking a small **blood sample from the fetal scalp** during labor to assess for fetal acidosis, typically done vaginally and not via abdominal puncture. - The instrument shown is a needle for fluid aspiration, not a blood sampling device or pH electrode. *Paracervical block* - A paracervical block is a regional anesthetic procedure involving injections into the **cervical tissue** to relieve pain during labor, which is not depicted in the image. - The image shows a procedure involving access to the amniotic fluid, not local anesthesia of the cervix.
Question 9: After an initial pregnancy resulted in a spontaneous loss in the first trimester, your patient is concerned about the possibility of this recurring. What is the chance of recurrence?
- A. Depends on the genetic makeup of the prior abortus
- B. Is no different than it was prior to the miscarriage (Correct Answer)
- C. Is increased to approximately 50%
- D. Is increased most likely to greater than 50%
Explanation: ### Explanation **Correct Answer: B. Is no different than it was prior to the miscarriage** **1. Why Option B is Correct:** Spontaneous abortion (miscarriage) is a common event, occurring in approximately 10–15% of clinically recognized pregnancies. The vast majority (up to 50–70%) of isolated first-trimester losses are due to **sporadic chromosomal abnormalities** (e.g., autosomal trisomies), which are random events. Statistically, after a **single** spontaneous loss, the risk of a subsequent miscarriage remains approximately **15–20%**, which is essentially the same as the baseline risk for the general population. The risk only begins to rise significantly after two or more consecutive losses. **2. Why Other Options are Wrong:** * **Option A:** While the genetic makeup of the abortus explains *why* that specific pregnancy failed, it does not dictate the recurrence risk for the next pregnancy unless a parental balanced translocation is present (which is rare and not the default assumption after a single loss). * **Options C & D:** These options overestimate the risk. A 50% recurrence risk is not reached even after three consecutive losses. After two losses, the risk rises to ~25–30%, and after three, it reaches ~33–45%. **3. Clinical Pearls for NEET-PG:** * **Most common cause of first-trimester abortion:** Fetal genetic factors (Chromosomal anomalies). * **Most common specific chromosomal anomaly:** Autosomal Trisomy (Trisomy 16 is the most common specific trisomy). * **Recurrent Pregnancy Loss (RPL):** Defined by the ASRM as **two or more** failed clinical pregnancies. Investigations for RPL are generally not indicated after a single isolated loss. * **Prognosis:** Even after 3 losses, the most likely outcome for the next pregnancy is a live birth (approx. 60–70% success rate without intervention).
Question 10: Which of the following is NOT an indication for genetic counseling?
- A. Parental age greater than 45 years (Correct Answer)
- B. Maternal age greater than 35 years
- C. Incest
- D. Previous child having dysmorphology
Explanation: ### Explanation **1. Why Option A is the correct answer:** In the context of standard obstetric guidelines (ACOG/RCOG), the primary trigger for genetic counseling regarding chromosomal abnormalities is **Advanced Maternal Age (AMA)**, defined as **≥35 years** at the time of delivery. While advanced paternal age (often cited as >40 or >45) is associated with a slight increase in *de novo* autosomal dominant mutations (e.g., Achondroplasia), it is **not** a standard, standalone indication for formal genetic counseling in the same way maternal age is. The term "Parental age" in Option A is a distractor because it generalizes both parents; specifically, paternal age alone does not mandate the same level of screening as maternal age. **2. Analysis of Incorrect Options:** * **B. Maternal age >35 years:** This is a classic indication. At age 35, the risk of a mid-trimester amniocentesis-related loss roughly equals the risk of Down Syndrome (1 in 270), making counseling and screening essential. * **C. Incest (Consanguinity):** Consanguineous unions significantly increase the risk of autosomal recessive disorders. Counseling is mandatory to discuss carrier screening and pedigree analysis. * **D. Previous child with dysmorphology:** Any previous offspring with structural defects, intellectual disability, or metabolic disorders requires genetic evaluation to determine the recurrence risk (e.g., translocation Down Syndrome vs. Trisomy 21). **3. NEET-PG High-Yield Pearls:** * **Advanced Maternal Age (AMA):** Defined as **≥35 years**. * **Most common chromosomal abnormality in AMA:** Trisomy 21 (Down Syndrome). * **Paternal Age Effect:** Associated with "Point Mutations" (e.g., Apert syndrome, Achondroplasia) rather than chromosomal non-disjunction. * **Indications for Prenatal Diagnosis:** Previous child with chromosomal anomaly, parental balanced translocation, ultrasound-detected fetal anomalies, and positive biochemical screening (Triple/Quadruple markers).
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