AWHONN Advanced Fetal Heart Monitoring Exam Prep |
Comprehensive Study Guide & Practice Questions | Updated
2026 |Detailed Answers and Expert Solutions.
1. A laboring patient at 39 weeks has a fetal heart rate baseline of 145
bpm. Variability is 8–15 bpm, accelerations are present, and there are no
late or variable decelerations. Which interpretation is most
appropriate?
A. Category I
B. Category II
C. Category III
D. Sinusoidal pattern
Answer: A. Category I
Rationale:
This tracing contains all of the major characteristics of a Category I pattern.
The baseline is within the normal range of 110–160 bpm, and variability is
moderate because the fluctuations are between 6 and 25 bpm. The presence
of accelerations is reassuring, while the absence of recurrent late or variable
decelerations further supports a normal tracing.
Category I patterns are considered reassuring because they are associated
with a high likelihood of normal fetal oxygenation and acid–base status at the
time of assessment. However, the nurse should continue ongoing assessment
because fetal status can change during labor. Fetal monitoring is not a one-
time classification; the tracing must be continually reassessed.
2. A patient receiving oxytocin has contractions occurring six times in 10
minutes, averaged over a 30-minute period. The fetal heart rate shows
recurrent late decelerations. What is the nurse's priority concern?
A. Fetal head compression
B. Excessive uterine activity reducing fetal oxygenation
C. Normal physiologic response to labor
D. Fetal sleep cycle
pg. 1
,Answer: B. Excessive uterine activity reducing fetal oxygenation
Rationale:
More than five contractions in 10 minutes, averaged over 30 minutes,
represents uterine tachysystole. When excessive uterine activity is
accompanied by recurrent late decelerations, concern increases because the
uterus may not be allowing adequate time for uteroplacental blood flow to
recover between contractions.
Oxytocin can contribute to tachysystole. The nurse should evaluate the
oxytocin infusion, maternal position, maternal blood pressure, hydration
status, and fetal tracing. Appropriate intrauterine resuscitative measures
should be initiated according to the clinical situation and institutional
protocol.
The important advanced concept is that the nurse should not interpret the
fetal heart rate separately from uterine activity. The fetal response must be
considered in relation to the contraction pattern.
3. A fetal heart rate decreases abruptly from 150 bpm to 90 bpm. The
nadir occurs 20 seconds after the beginning of the deceleration, and the
recovery occurs rapidly. The timing varies from contraction to
contraction. Which type of deceleration is present?
A. Early
B. Late
C. Variable
D. Prolonged
Answer: C. Variable
Rationale:
The key word is abrupt. A variable deceleration has an onset-to-nadir interval
of less than 30 seconds. Variable decelerations commonly result from
umbilical cord compression.
The pattern can differ from one contraction to another in its timing, depth,
and shape. The clinical significance depends on the entire tracing. Occasional
variable decelerations with moderate variability may be tolerated, whereas
pg. 2
,recurrent deep or prolonged variables, especially when accompanied by
reduced variability, require more concern and intervention.
An advanced assessment should therefore consider:
Frequency of the variables
Duration
Depth
Presence of accelerations
Baseline variability
Relationship to contractions
Maternal and fetal clinical condition
4. A patient's fetal heart rate baseline is 135 bpm with moderate
variability. Recurrent late decelerations are present. Which category is
most appropriate?
A. Category I
B. Category II
C. Category III
D. Sinusoidal
Answer: B. Category II
Rationale:
Recurrent late decelerations prevent this tracing from being Category I.
However, moderate variability is present, so it does not meet the definition
of Category III based on absent variability with recurrent late decelerations.
Therefore, the tracing is Category II.
This distinction is extremely important in advanced fetal monitoring. Category
II is an indeterminate category, not automatically an emergency. The nurse
should evaluate the pattern, identify possible causes, intervene when
appropriate, and reassess the fetal response.
pg. 3
, 5. A fetal heart tracing shows a baseline of 140 bpm with absent
variability and recurrent late decelerations. What is the most
appropriate classification?
A. Category I
B. Category II
C. Category III
D. Normal fetal sleep pattern
Answer: C. Category III
Rationale:
This is a Category III pattern because the tracing demonstrates absent
variability with recurrent late decelerations.
Absent variability indicates that there is essentially no detectable fluctuation
around the baseline. When absent variability is combined with recurrent late
decelerations, the tracing becomes particularly concerning because the fetus
may have limited ability to compensate for ongoing stress or impaired
oxygenation.
The nurse should not simply continue routine observation. The maternal and
fetal condition should be assessed immediately, reversible causes should be
addressed, and the response to interventions should be evaluated. If the
abnormal pattern persists despite appropriate interventions, escalation and
possible expedited birth may be necessary depending on the clinical
circumstances.
6. A patient becomes hypotensive shortly after receiving an epidural.
Five minutes later, recurrent late decelerations develop. Which
physiologic mechanism best explains the fetal heart rate changes?
A. Increased fetal head compression
B. Reduced maternal uteroplacental perfusion
C. Increased fetal oxygen delivery
D. Umbilical cord prolapse
Answer: B. Reduced maternal uteroplacental perfusion
pg. 4
Comprehensive Study Guide & Practice Questions | Updated
2026 |Detailed Answers and Expert Solutions.
1. A laboring patient at 39 weeks has a fetal heart rate baseline of 145
bpm. Variability is 8–15 bpm, accelerations are present, and there are no
late or variable decelerations. Which interpretation is most
appropriate?
A. Category I
B. Category II
C. Category III
D. Sinusoidal pattern
Answer: A. Category I
Rationale:
This tracing contains all of the major characteristics of a Category I pattern.
The baseline is within the normal range of 110–160 bpm, and variability is
moderate because the fluctuations are between 6 and 25 bpm. The presence
of accelerations is reassuring, while the absence of recurrent late or variable
decelerations further supports a normal tracing.
Category I patterns are considered reassuring because they are associated
with a high likelihood of normal fetal oxygenation and acid–base status at the
time of assessment. However, the nurse should continue ongoing assessment
because fetal status can change during labor. Fetal monitoring is not a one-
time classification; the tracing must be continually reassessed.
2. A patient receiving oxytocin has contractions occurring six times in 10
minutes, averaged over a 30-minute period. The fetal heart rate shows
recurrent late decelerations. What is the nurse's priority concern?
A. Fetal head compression
B. Excessive uterine activity reducing fetal oxygenation
C. Normal physiologic response to labor
D. Fetal sleep cycle
pg. 1
,Answer: B. Excessive uterine activity reducing fetal oxygenation
Rationale:
More than five contractions in 10 minutes, averaged over 30 minutes,
represents uterine tachysystole. When excessive uterine activity is
accompanied by recurrent late decelerations, concern increases because the
uterus may not be allowing adequate time for uteroplacental blood flow to
recover between contractions.
Oxytocin can contribute to tachysystole. The nurse should evaluate the
oxytocin infusion, maternal position, maternal blood pressure, hydration
status, and fetal tracing. Appropriate intrauterine resuscitative measures
should be initiated according to the clinical situation and institutional
protocol.
The important advanced concept is that the nurse should not interpret the
fetal heart rate separately from uterine activity. The fetal response must be
considered in relation to the contraction pattern.
3. A fetal heart rate decreases abruptly from 150 bpm to 90 bpm. The
nadir occurs 20 seconds after the beginning of the deceleration, and the
recovery occurs rapidly. The timing varies from contraction to
contraction. Which type of deceleration is present?
A. Early
B. Late
C. Variable
D. Prolonged
Answer: C. Variable
Rationale:
The key word is abrupt. A variable deceleration has an onset-to-nadir interval
of less than 30 seconds. Variable decelerations commonly result from
umbilical cord compression.
The pattern can differ from one contraction to another in its timing, depth,
and shape. The clinical significance depends on the entire tracing. Occasional
variable decelerations with moderate variability may be tolerated, whereas
pg. 2
,recurrent deep or prolonged variables, especially when accompanied by
reduced variability, require more concern and intervention.
An advanced assessment should therefore consider:
Frequency of the variables
Duration
Depth
Presence of accelerations
Baseline variability
Relationship to contractions
Maternal and fetal clinical condition
4. A patient's fetal heart rate baseline is 135 bpm with moderate
variability. Recurrent late decelerations are present. Which category is
most appropriate?
A. Category I
B. Category II
C. Category III
D. Sinusoidal
Answer: B. Category II
Rationale:
Recurrent late decelerations prevent this tracing from being Category I.
However, moderate variability is present, so it does not meet the definition
of Category III based on absent variability with recurrent late decelerations.
Therefore, the tracing is Category II.
This distinction is extremely important in advanced fetal monitoring. Category
II is an indeterminate category, not automatically an emergency. The nurse
should evaluate the pattern, identify possible causes, intervene when
appropriate, and reassess the fetal response.
pg. 3
, 5. A fetal heart tracing shows a baseline of 140 bpm with absent
variability and recurrent late decelerations. What is the most
appropriate classification?
A. Category I
B. Category II
C. Category III
D. Normal fetal sleep pattern
Answer: C. Category III
Rationale:
This is a Category III pattern because the tracing demonstrates absent
variability with recurrent late decelerations.
Absent variability indicates that there is essentially no detectable fluctuation
around the baseline. When absent variability is combined with recurrent late
decelerations, the tracing becomes particularly concerning because the fetus
may have limited ability to compensate for ongoing stress or impaired
oxygenation.
The nurse should not simply continue routine observation. The maternal and
fetal condition should be assessed immediately, reversible causes should be
addressed, and the response to interventions should be evaluated. If the
abnormal pattern persists despite appropriate interventions, escalation and
possible expedited birth may be necessary depending on the clinical
circumstances.
6. A patient becomes hypotensive shortly after receiving an epidural.
Five minutes later, recurrent late decelerations develop. Which
physiologic mechanism best explains the fetal heart rate changes?
A. Increased fetal head compression
B. Reduced maternal uteroplacental perfusion
C. Increased fetal oxygen delivery
D. Umbilical cord prolapse
Answer: B. Reduced maternal uteroplacental perfusion
pg. 4
