Normal fetal heart rate at 38 weeks of gestational period is ?

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2022

Explanation

The normal baseline fetal heart rate (FHR) for a term fetus (at 38 weeks) is internationally accepted to be between 110 and 160 beats per minute (bpm).
The option of 120-160 bpm is the only choice that falls completely and safely within this established normal range.
A normal FHR is a primary indicator of adequate fetal oxygenation and a properly functioning autonomic nervous system.

Option A: This range (80-100 bpm) represents fetal bradycardia, as it is below the lower limit of the normal range (110 bpm).
Option B: This range includes rates below the normal threshold. A heart rate of 100 bpm is considered bradycardia, making this option not fully correct.
Option D: A heart rate of 180 bpm indicates fetal tachycardia, as it is above the upper limit of the normal range (160 bpm).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Assessment of fetal well-being and normal fetal heart rate (FHR) as background academic context rather than a clinical decision trigger.
Accurate assessment of the FHR is a fundamental nursing responsibility during antepartum and intrapartum care to monitor fetal well-being and detect distress early.
Any deviation from the normal range is a critical finding that requires prompt nursing assessment, documentation, and reporting to the healthcare provider for potential intervention.
What if? If the FHR was consistently 175 bpm (tachycardia), the nurse's priority actions would include assessing the mother's temperature and hydration status, as maternal fever is a common cause, and notifying the provider immediately.

How to Approach the Question

First, identify the core of the question: what is the 'normal' fetal heart rate (FHR) at '38 weeks' (term).
Recall the standard, evidence-based range for a normal baseline FHR, which is 110 to 160 beats per minute.
Systematically evaluate each option against this standard range.
Eliminate options that clearly represent an abnormality: 80-100 bpm is bradycardia (too slow), and 180 bpm is tachycardia (too fast).
Assess the borderline option (100-120 bpm). Recognize that since it includes rates below 110 bpm, it is not the best description of the normal range.
Select the option that fits entirely within the normal range, which is 120-160 bpm.

Concept Tested & Keywords

Concept Tested: Assessment of fetal well-being and normal fetal heart rate (FHR).
Stem keywords: Normal, fetal heart rate, 38 weeks, gestational period
Lead-in keywords: is ?
Clinical cues: 38 weeks of gestational period: This indicates a full-term fetus, for which the standard FHR range applies.
Negative lead-in flag: false

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E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 38-46

E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 131-133

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