Comprehensive and Detailed Explanation From Exact Extract–Based NCC C-EFM References (No URLs):
Interpretation of fetal heart rate (FHR) tracings in the NCC C-EFM exam follows the standardized NICHD three-tier classification, which is fully adopted in NCC’s content outline and recommended references such as AWHONN Fetal Heart Monitoring Principles & Practices, Miller’s EFM Pocket Guide, Menihan, Simpson’s Perinatal Nursing, and Creasy & Resnik.
Baseline:
The tracing demonstrates an FHR baseline around 145–150 bpm, which falls within the normal range of 110–160 bpm. NCC references define baseline as the mean FHR rounded to increments of 5 bpm over a 10-minute window.
Variability:
The strip shows minimal variability, with amplitude fluctuations approximately 0–2 bpm.
According to NCC-aligned definitions:
Moderate variability: 6–25 bpm
Minimal variability: 1–5 bpm
Absent variability: undetectable amplitude
This tracing shows minimal variability, not moderate, so it cannot be Category I.
Accelerations:
No accelerations are present. Lack of accelerations alone does not classify the tracing as Category III.
Decelerations:
There are no recurrent late decelerations, no recurrent variable decelerations, and no prolonged decelerations. Without these, and with minimal variability, the tracing does not meet Category III criteria.
Category III criteria (per NICHD/NCC):
Must include at least one of the following:
Absent variability with recurrent late decelerations
Absent variability with recurrent variable decelerations
Absent variability with bradycardia
Sinusoidal pattern
None of these are present.
Category II criteria (per NICHD/NCC):
Category II includes tracings that are not Category I or III.
Examples specifically listed include:
Minimal variability
Absent accelerations after fetal stimulation
Tachycardia
Bradycardia without absent variability
Variable or late decelerations occurring intermittently
Because this tracing shows minimal variability, a normal baseline, no accelerations, and no recurrent decelerations, it fits squarely into Category II.
Therefore, the correct classification is Category II.
[References:NCC C-EFM Candidate Guide and Content Outline (2025); AWHONN Fetal Heart Monitoring Principles & Practices; Miller’s Fetal Monitoring Pocket Guide; Menihan Electronic Fetal Monitoring; Simpson & Creehan Perinatal Nursing; Creasy & Resnik Maternal–Fetal Medicine; NICHD Three-Tier FHR Interpretation System., , , , , , ]