Perinatal Mortality and Morbidity — MCQs
Calculate the maternal mortality ratio (MMR) for the year 2023, given the following data: - Total live births: 4,000 - Women who died: 6 (1 due to a road traffic accident (RTA), 1 due to sepsis, 1 due to obstructed labor, 1 due to eclampsia, 1 due to ectopic pregnancy, and 1 due to a snake bite)
What does perinatal mortality include?
For international comparisons, the perinatal mortality rate is calculated as late fetal deaths (28 weeks' gestation or more) plus early neonatal deaths (in the first week) in a year per:
What is the neonatal mortality rate in a population where there were 4050 total births, 50 stillbirths, and 150 total neonatal deaths within the first 28 days of life (which includes 50 deaths within the first 7 days)?
In a town there are 2500 live births within six months. During the same period 5 women died due to peripartum infection, 5 died due to electrocution, 2 died due to obstructed labor and 3 died due to PPH. What is the MMR?
Which of the following is a FALSE statement regarding Cerebral Palsy?
With reference to Respiratory Distress Syndrome (RDS), which of the following statements is false?
The term Perinatal covers the period from :
The net effect of antenatal care has been the following EXCEPT:
Which of the following is included in the numerator for perinatal mortality rate?
Perinatal Mortality and Morbidity Indian Medical PG Practice Questions and MCQs
Question 1: Calculate the maternal mortality ratio (MMR) for the year 2023, given the following data: - Total live births: 4,000 - Women who died: 6 (1 due to a road traffic accident (RTA), 1 due to sepsis, 1 due to obstructed labor, 1 due to eclampsia, 1 due to ectopic pregnancy, and 1 due to a snake bite)
- A. 75 per 100,000 live births
- B. 150 per 100,000 live births
- C. 100 per 100,000 live births (Correct Answer)
- D. 125 per 100,000 live births
Explanation: ***Correct: 100 per 100,000 live births*** - The **maternal mortality ratio (MMR)** includes deaths directly or indirectly due to pregnancy, childbirth, or within 42 days of termination of pregnancy, **excluding accidental or incidental causes**. - In this scenario, **4 maternal deaths** are identified: sepsis (direct), obstructed labor (direct), eclampsia (direct), and ectopic pregnancy (direct). - **Excluded deaths**: RTA and snake bite are **incidental/accidental deaths** not related to pregnancy complications. - **Calculation**: MMR = (4 / 4,000) × 100,000 = **100 per 100,000 live births** *Incorrect: 75 per 100,000 live births* - This would incorrectly count only **3 maternal deaths** instead of 4, suggesting underestimation or exclusion of a valid maternal death (e.g., ectopic pregnancy). - Represents a **miscalculation** that underestimates maternal mortality burden. *Incorrect: 150 per 100,000 live births* - This would incorrectly include **6 deaths** (all deaths including RTA and snake bite), failing to exclude incidental causes. - Including **non-maternal accidental deaths** inflates MMR and misrepresents actual maternal health outcomes. *Incorrect: 125 per 100,000 live births* - This would incorrectly count **5 deaths**, suggesting inclusion of one incidental death (either RTA or snake bite). - Fails to properly identify and exclude **both incidental deaths**, leading to an overestimated ratio.
Question 2: What does perinatal mortality include?
- A. Deaths after 28 weeks of gestation
- B. Deaths within the first 7 days after birth
- C. From the period of viability
- D. Both late fetal deaths and early neonatal deaths (Correct Answer)
Explanation: ***Both late fetal deaths and early neonatal deaths*** - Perinatal mortality encompasses deaths occurring both in the **late fetal period** (typically after 20-22 weeks of gestation, or commonly defined as 28 weeks or more) and during the **early neonatal period** (the first 7 days of life). - This broad definition helps to capture mortality related to conditions around the time of birth, including those stemming from **pregnancy complications**, labor, delivery, and immediate postnatal adaptation. *Deaths after 28 weeks of gestation* - This describes **late fetal deaths** (stillbirths) but does not include deaths that occur after birth, thus only covering a part of perinatal mortality. - Perinatal mortality is a broader measure that combines both stillbirths and early infant deaths. *Deaths within the first 7 days after birth* - This specifically defines **early neonatal deaths**, which are a component of perinatal mortality, but it excludes fetal deaths. - Perinatal mortality aims to assess factors impacting survival around the time of birth, both before and immediately after. *From the period of viability* - The period of viability refers to when a fetus can survive outside the uterus, which varies (often cited as 20-24 weeks), and would include very premature fetuses, but it isn't an explicit definition of perinatal mortality itself. - This term describes when a fetus is considered potentially viable but does not define the specific timeframe or types of deaths included in perinatal mortality.
Question 3: For international comparisons, the perinatal mortality rate is calculated as late fetal deaths (28 weeks' gestation or more) plus early neonatal deaths (in the first week) in a year per:
- A. 100 live births
- B. 1,000 live births (Correct Answer)
- C. 10,000 live births
- D. 100,000 live births
Explanation: ***1,000 live births*** - Perinatal mortality rate is typically expressed per **1,000 live births** for international comparisons to standardize reporting and analysis of fetal and early neonatal deaths. - This denominator provides a good balance for statistical significance without making the numbers too small or too large, allowing for meaningful comparisons between populations. *100 live births* - Using **100 live births** as the denominator would result in a perinatal mortality rate that appears numerically higher, which could complicate comparisons with other standard health indicators usually reported per 1,000 or 100,000. - While it's a valid way to express a rate, it's not the **standard convention** for perinatal mortality in international settings. *10,000 live births* - Expressing the rate per **10,000 live births** would lead to very small numbers, potentially making subtle differences harder to appreciate and interpret. - It's not the **standard denominator** used for perinatal mortality, although it might be used for rarer events. *100,000 live births* - A denominator of **100,000 live births** is typically reserved for very rare events or conditions where the incidence is extremely low, such as maternal mortality, to obtain more manageable integer values. - Perinatal mortality is more common than events reported per 100,000, so this denominator would yield **fractions or very small whole numbers**, making it less intuitive for this specific measure.
Question 4: What is the neonatal mortality rate in a population where there were 4050 total births, 50 stillbirths, and 150 total neonatal deaths within the first 28 days of life (which includes 50 deaths within the first 7 days)?
- A. 30.0
- B. 37.5 (Correct Answer)
- C. 45.0
- D. 25.0
Explanation: ***37.5*** - **Neonatal mortality rate (NMR)** is calculated as deaths occurring within the first **28 completed days of life** per 1000 live births. - **Calculation**: Live births = 4050 total births - 50 stillbirths = 4000; NMR = (150 total neonatal deaths / 4000 live births) × 1000 = **37.5 per 1000 live births**. *30.0* - This incorrect value represents a **miscalculation** that doesn't correspond to any logical subset of the given data in the question. - **Error**: Even using only early neonatal deaths (50 deaths in first 7 days) would yield (50/4000) × 1000 = **12.5**, not 30.0, indicating a fundamental computational error. *45.0* - This value incorrectly includes **stillbirths** in the numerator or uses wrong denominators in the calculation. - **Error**: Stillbirths are **not counted** in neonatal mortality; only deaths after live birth are included in NMR calculations. *25.0* - This represents a significant **undercounting** of neonatal deaths, possibly using only partial death data. - **Error**: Fails to account for the complete **150 neonatal deaths** within 28 days, leading to substantial underestimation.
Question 5: In a town there are 2500 live births within six months. During the same period 5 women died due to peripartum infection, 5 died due to electrocution, 2 died due to obstructed labor and 3 died due to PPH. What is the MMR?
- A. 6 per 1000 live births
- B. 40 per 1000 live births
- C. 60 per 1000 live births
- D. 4 per 1000 live births (Correct Answer)
Explanation: ***4 per 1000 live births*** - The **Maternal Mortality Ratio (MMR)** is calculated as the number of maternal deaths per 100,000 live births. In this scenario, only deaths directly related to pregnancy or within 42 days postpartum from obstetric causes are considered maternal deaths. - Total maternal deaths = 5 (peripartum infection) + 2 (obstructed labor) + 3 (PPH) = 10. MMR = (10 maternal deaths / 2500 live births) * 1000 = 4. *6 per 1000 live births* - This calculation would incorrectly include deaths from non-obstetric causes, such as the 5 deaths due to electrocution, which are not considered maternal deaths. - Including non-maternal deaths inflates the ratio, leading to an inaccurate representation of obstetric risk. *40 per 1000 live births* - This value is significantly higher, suggesting a miscalculation in either the number of maternal deaths or the live births, potentially by using a multiplier of 100,000 live births instead of 1,000 for this question, or an arithmetic error. - A common error might be to multiply the total number of maternal deaths by 1000 and divide by the number of live births, leading to an incorrect large number if the base is not handled correctly. *60 per 1000 live births* - This result is far too high and indicates a significant overestimation of maternal deaths or a severe miscalculation. - It likely arises from a compounding of errors, possibly including non-maternal deaths and incorrect scaling of the denominator.
Question 6: Which of the following is a FALSE statement regarding Cerebral Palsy?
- A. Cerebral palsy occurs due to one time insult to developing fetal brain
- B. Periventricular leucomalacia causes spastic diplegia
- C. Persistent cortical thumb after 3 months of age is seen in spastic cerebral palsy
- D. Birth trauma is the most common cause of cerebral palsy (Correct Answer)
Explanation: ***Birth trauma is the most common cause of cerebral palsy*** - While birth trauma can contribute to brain injury, **prematurity** and **intrauterine growth restriction** are actually more frequent risk factors for cerebral palsy. - The majority of cerebral palsy cases originate from prenatal or perinatal events, with **birth asphyxia** being a less common cause than historically believed. *Cerebral palsy occurs due to one time insult to developing fetal brain* - Cerebral palsy is defined by a **non-progressive disturbance** in the developing fetal or infant brain, which is indeed a "one time insult" rather than a degenerative process. - This insult can occur before, during, or shortly after birth, leading to permanent but **non-worsening** motor impairments. *Periventricular leucomalacia causes spastic diplegia* - **Periventricular leucomalacia (PVL)**, a type of white matter brain injury, is strongly associated with **spastic diplegia**, particularly in premature infants. - PVL damages the periventricular white matter that contains descending motor tracts to the lower limbs, hence causing a **diplegic** (legs more affected than arms) presentation. *Persistent cortical thumb after 3 months of age is seen in spastic cerebral palsy* - A **cortical thumb**, where the thumb is held adducted and flexed across the palm, can be a sign of **upper motor neuron lesion** or spasticity. - Its persistence beyond 3 months of age is an indicator of neurological dysfunction and is often observed in infants who develop **spastic cerebral palsy**.
Question 7: With reference to Respiratory Distress Syndrome (RDS), which of the following statements is false?
- A. Leads to respiratory distress in premature infants
- B. Is less common in babies born to diabetic mothers (Correct Answer)
- C. Is treated by administering surfactant therapy
- D. Usually occurs in infants born before 34 weeks of gestation
Explanation: ***Is less common in babies born to diabetic mothers*** - Babies born to **diabetic mothers** are at an **increased risk** of Respiratory Distress Syndrome (RDS) due to delayed lung maturation caused by **hyperinsulinemia.** - Insulin inhibits the production of **surfactant**, a substance critical for reducing surface tension in the alveoli and preventing lung collapse. - This statement is **FALSE** - RDS is actually **MORE common** in infants of diabetic mothers. *Leads to respiratory distress in premature infants* - RDS is primarily a disease of **prematurity**, resulting from a deficiency of **surfactant** in the immature lungs. - This deficiency leads to widespread **atelectasis** (lung collapse), which causes breathing difficulties immediately or shortly after birth. - This statement is **TRUE**. *Is treated by administering surfactant therapy* - **Surfactant therapy** is a cornerstone of RDS treatment, often delivered via an **endotracheal tube**. - It works by replacing the deficient natural surfactant, thereby improving **lung compliance** and reducing the work of breathing. - This statement is **TRUE**. *Usually occurs in infants born before 34 weeks of gestation* - RDS predominantly affects infants born **before 34 weeks of gestation**, as their lungs are typically not mature enough to produce sufficient surfactant. - The risk **decreases significantly** with increasing gestational age, with full-term infants rarely developing the condition. - This statement is **TRUE**.
Question 8: The term Perinatal covers the period from :
- A. 28 weeks gestation to one week after birth (Correct Answer)
- B. 28 weeks gestation to one month after birth
- C. 24 weeks gestation to one week after birth
- D. First 4 weeks after birth
Explanation: ***28 weeks gestation to one week after birth*** - The **perinatal period** is traditionally defined as encompassing the period from **28 completed weeks of gestation** until **7 completed days after birth**. - This definition is crucial for statistical purposes related to **perinatal mortality and morbidity**, as it covers the late fetal and early neonatal stages when many risks are highest. - **Note:** While WHO updated the definition in 2016 to start from **22 completed weeks** for international reporting, the **28-week definition** remains the classical definition widely used in medical education and was the standard definition at the time of this exam (2013). *28 weeks gestation to one month after birth* - This definition extends beyond the typical perinatal period, which concludes at **one week post-birth** (7 completed days). - While it includes the late fetal period, the **one-month post-birth** timeframe extends into the broader **neonatal period** (0-28 days). *24 weeks gestation to one week after birth* - Although 24 weeks is close to the **viability threshold**, the standard definition for the onset of the perinatal period has traditionally been **28 completed weeks of gestation**. - Starting at **24 weeks** makes the period longer than the classically accepted definition, though it's closer to the modern WHO threshold of 22 weeks. *First 4 weeks after birth* - This period describes the **neonatal period**, which specifically refers to the time from birth up to **28 completed days** of life. - It does not include any part of the **fetal period**, which is a key component of the perinatal definition.
Question 9: The net effect of antenatal care has been the following EXCEPT:
- A. Reduction in maternal morbidity
- B. Reduction in perinatal mortality
- C. Reduction in the incidence of institutional delivery (Correct Answer)
- D. Reduction in maternal mortality
Explanation: ***Reduction in the incidence of institutional delivery*** - Antenatal care aims to increase awareness of safe delivery practices and encourage women to deliver in health facilities, thereby **increasing institutional deliveries**, not reducing them. - Improved access to and understanding of obstetric care through ANC promotes safer childbirth environments. *Reduction in maternal morbidity* - Antenatal care plays a crucial role in the early detection and management of **pregnancy-related complications** such as pre-eclampsia, gestational diabetes, and infections. - This proactive management minimizes the severity and impact of these conditions on maternal health. *Reduction in perinatal mortality* - Regular antenatal visits allow for monitoring of fetal growth and well-being, identification of **fetal distress**, and intervention for conditions like intrauterine growth restriction. - Early detection and management of issues affecting the fetus significantly improve perinatal outcomes and reduce **stillbirths** and **neonatal deaths**. *Reduction in maternal mortality* - ANC provides essential health education, nutritional advice, and timely vaccinations, which are vital for a healthy pregnancy. - It also facilitates preparedness for childbirth and potential complications, thereby **reducing the risk of maternal death** from preventable causes.
Question 10: Which of the following is included in the numerator for perinatal mortality rate?
- A. Early neonatal death with weight ≥500 grams
- B. Still birth of fetus > 500 grams (Correct Answer)
- C. Post neonate death with weight 2.5 kg
- D. Abortion of < 500 gram foetus
Explanation: ***Still birth of fetus > 500 grams*** - The **perinatal mortality rate** includes both **stillbirths** and **early neonatal deaths** (deaths within first 7 days of life). - A stillbirth is defined as fetal death occurring at **≥20 weeks of gestation** or with a fetal weight of **≥500 grams**. - This option is **correct** as stillbirths form a key component of the perinatal mortality numerator. *Early neonatal death with weight ≥500 grams* - This is **also included** in the perinatal mortality rate numerator, as early neonatal deaths (first 7 days of life) are part of the definition. - However, the weight criterion of **≥500 grams** is more specifically a stillbirth criterion; early neonatal deaths are defined by timing (first 7 days after **live birth**) rather than weight. - Both this option and stillbirths are technically correct components, but **stillbirth** is the more precise answer given the specific weight criterion mentioned. *Post neonate death with weight 2.5 kg* - **Post-neonatal deaths** (deaths from 28 days to 1 year of life) are **not included** in the perinatal mortality rate. - The perinatal period extends only from **22 weeks of gestation to 7 completed days after birth** (WHO definition). *Abortion of < 500 gram foetus* - Abortion or fetal loss with weight **<500 grams** (typically <20 weeks gestation) is **not included** in perinatal mortality. - These are classified as **early fetal losses or miscarriages**, falling below the threshold for stillbirth definition.
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