LMP of Babita is June 10, Her EDD should be which of the following?

Appeared in: AIIMS Raipur - 2017 (Shift-3)

Explanation

The Expected Date of Delivery (EDD) is commonly estimated using Naegele's Rule.
The formula for Naegele's Rule is: First day of Last Menstrual Period (LMP) + 7 days - 3 months + 1 year.
An alternative and simpler calculation is: LMP + 9 months + 7 days.
Applying the rule to an LMP of June 10: Add 7 days to get June 17. Then, add 9 months to June, which results in March of the following year.
Therefore, the calculated EDD is March 17.

Option A: This date results from incorrectly subtracting only 2 months from the LMP month (June - 2 months = April) instead of the standard 3 months.
Option C: This date does not follow any standard formula for calculating EDD. It appears to be an arbitrary date close to the original LMP.
Option D: This date is approximately 4 months after the LMP, which is far too short for a full-term pregnancy. It does not align with the 9-month gestation period.

Visual 1: Infographic - A clear, step-by-step visual guide demonstrating how to apply Naegele's Rule with the example from the question (LMP: June 10 -> EDD: March 17).
Visual 2: Calendar - A visual of a calendar showing the counting process: starting from June 10, counting back 3 months to March, and then adding 7 days to land on March 17 of the next year.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Calculation of Expected Date of Delivery (EDD) using Naegele's Rule as background academic context rather than a clinical decision trigger.
Accurate EDD calculation is crucial for timing antenatal screenings, monitoring fetal growth, and planning for delivery.
Nurses must be proficient in calculating EDD using Naegele's rule as it is a fundamental skill in maternity care and frequently tested in nursing exams.
It is important for nurses to educate patients that the EDD is an estimate, and only about 5% of babies are born on their exact due date. Labor can naturally begin anytime between 38 and 42 weeks.

How to Approach the Question

First, identify the key information provided in the question: the Last Menstrual Period (LMP) is June 10.
Recognize that the question is asking for the Expected Date of Delivery (EDD).
Recall the standard formula for this calculation, which is Naegele's Rule.
Apply Naegele's Rule: Add 7 days to the LMP date and then add 9 months (or subtract 3 months and add a year).
Calculation: June 10 + 7 days = June 17. June + 9 months = March of the next year. The result is March 17.
Compare your calculated date with the given options to find the correct match.

Concept Tested & Keywords

Concept Tested: Calculation of Expected Date of Delivery (EDD) using Naegele's Rule.
Stem keywords: LMP, EDD, June 10
Lead-in keywords: which of the following

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Practise the full AIIMS Raipur - 2017 (Shift-3)

Attempt every question from this paper in a timed mock, then review the full solution for each one.