Approximately how many pregnant women are there in a sub-center whose population is 4800 and birth rate is 25?

MP CHO -2019 (Shift-2)

Community Health Nursing

Medium

Appeared in: MP CHO -2019 (Shift-2)

Explanation

The number of expected live births in a year is calculated using the formula: (Population × Crude Birth Rate) / 1000.
For a population of 4800 and a birth rate of 25, the expected number of live births is (4800 × 25) / 1000 = 120.
This annual caseload of 120 falls directly within the 120-130 range.
Even when accounting for a 10% pregnancy wastage (abortions/stillbirths), the total estimated pregnancies become 132, which is closest to the 120-130 range among the given options.

Option A: This range reflects the point prevalence (the number of women pregnant at any single time), not the total number of pregnancies over a year needed for planning.
Option B: This range is a clear underestimation based on the provided population and birth rate.
Option D: This range is an overestimation. The calculated total number of pregnancies, even with a 10% wastage factor, is 132, which is below this range.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Calculation of expected pregnancies in a community based on population and birth rate as background academic context rather than a clinical decision trigger.
This calculation is a fundamental skill for community health nurses, ANMs, and CHOs for effective planning and resource management at the sub-center level.
Estimating the annual number of pregnancies helps in forecasting the required stock of essential supplies like Iron and Folic Acid (IFA) tablets, Tetanus Toxoid (TT) vaccines, and delivery kits.
It allows for setting realistic targets for antenatal care (ANC) registration, postnatal care (PNC) visits, and institutional deliveries, which are key performance indicators for MCH services.

How to Approach the Question

First, identify the key data provided in the question: Total Population (4800) and Crude Birth Rate (25 per 1000).
Recall the standard formula to calculate the number of expected live births in a year: (Total Population / 1000) × Birth Rate.
Substitute the given values into the formula: (4800 / 1000) × 25.
Perform the calculation: 4.8 × 25 = 120. This is the expected number of live births.
Consider the standard practice of adding a 10% margin for pregnancy wastage (abortions/stillbirths) for a more complete estimate of total pregnancies: 120 + (10% of 120) = 132.
Compare your calculated values (120 and 132) with the given option ranges. The range 120-130 is the best fit, as it contains the primary calculation and is closest to the adjusted figure.

Concept Tested & Keywords

Concept Tested: Calculation of expected pregnancies in a community based on population and birth rate.
Stem keywords: sub-center, population, 4800, birth rate, 25, pregnant women
Lead-in keywords: how many
Clinical cues: Age/sex group narrows the expected diagnosis, intervention, or normal reference range.

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E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart A (pp 1-232 of 464) p. 18-20