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

Appeared in: AIIMS Raipur - 2017 (shift-2)

Explanation

The Estimated Date of Delivery (EDD) is calculated using Naegele's Rule, which is a standard formula in obstetrics.
The rule involves adding 7 days to the first day of the Last Menstrual Period (LMP) and then subtracting 3 months (or adding 9 months) and adjusting the year.
Given the LMP is June 10, adding 7 days gives June 17.
Subtracting 3 months from June (the 6th month) gives March (the 3rd month).
Since the pregnancy crosses into a new calendar year, 1 year is added.
The final calculated EDD is March 17 of the following year.

Option A: This option represents an incorrect calculation of the month. April would be the result of subtracting only two months from June, not three as required by Naegele's rule.
Option C: This option results from an arbitrary and incorrect calculation that does not follow Naegele's rule.
Option D: This option is incorrect. It might result from mistakenly adding four months to the LMP instead of subtracting three.

Visual 1: Infographic - A visual guide demonstrating the two methods of calculating EDD using Naegele's Rule on a calendar view, starting from an LMP of June 10.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Calculation of Estimated Date of Delivery (EDD) using Naegele's Rule as background academic context rather than a clinical decision trigger.
Accurately calculating the EDD is fundamental in antenatal care for scheduling tests, monitoring fetal growth, and planning for delivery.
It helps in identifying preterm or post-term pregnancies, which require specific management protocols to optimize maternal and neonatal outcomes.
What if? If the patient has irregular menstrual cycles or is unsure of her LMP, Naegele's rule becomes unreliable. In such cases, an early first-trimester ultrasound (before 14 weeks' gestation) is the most accurate method to determine the gestational age and EDD.

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 Estimated Date of Delivery (EDD).
Recall the standard formula used to calculate EDD, which is Naegele's Rule.
Apply Naegele's Rule: Add 7 days to the LMP date and subtract 3 months from the LMP month (or, alternatively, add 9 months and 7 days to the LMP).
Perform the calculation: Date: 10 + 7 = 17. Month: June (6) - 3 = March (3). Since the delivery month is earlier in the year than the LMP month, add one year.
The calculated EDD is March 17. Compare this result with the given options to select the correct answer.

Concept Tested & Keywords

Concept Tested: Calculation of Estimated Date of Delivery (EDD) using Naegele's Rule
Stem keywords: LMP, Babita, June 10, EDD
Lead-in keywords: which of the following
Negative lead-in flag: false

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Practise the full AIIMS Raipur - 2017 (shift-2)

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