NCC EFM Certification Exam – Electronic Fetal Monitoring with Verified
Questions and Answers with Rationales
Question 1: A 28-year-old G1P0 patient at 39 weeks of gestation is admitted to the
labor and delivery unit in active labor. The nurse initiates continuous electronic fetal
monitoring (EFM) and observes a fetal heart rate (FHR) baseline of 140 bpm,
moderate variability, the presence of accelerations, and an absence of
decelerations. Based on the standardized three-tier FHR interpretation system
established by ACOG and NICHD, how should this tracing be classified, and what is
the most appropriate nursing action?
A. Category I; continue routine monitoring and provide standard labor care.
B. Category II; initiate intrauterine resuscitation measures immediately.
C. Category III; prepare the patient for an emergency cesarean delivery.
D. Category II; apply a fetal scalp electrode to obtain a more accurate tracing.
CORRECT ANSWER: A. Category I; continue routine monitoring and provide
standard labor care.
Rationale: A Category I tracing is characterized by a baseline of 110-160 bpm,
moderate variability, and the absence of late or variable decelerations. It is
predictive of normal fetal acid-base status, and routine care is indicated.
Question 2: A 32-year-old G3P2 patient at 37 weeks of gestation is receiving an
oxytocin infusion for labor augmentation. The nurse notes a fetal heart rate baseline
of 135 bpm with minimal variability, no accelerations, and intermittent variable
decelerations. According to the NICHD guidelines, how should this tracing be
classified, and what is the priority nursing intervention?
A. Category I; increase the oxytocin infusion rate.
B. Category II; reposition the mother and evaluate for intrauterine resuscitation
measures.
C. Category III; immediately discontinue oxytocin and prepare for operative
delivery.
D. Category II; apply a fetal scalp electrode to confirm the baseline heart rate.
CORRECT ANSWER: B. Category II; reposition the mother and evaluate for
intrauterine resuscitation measures.
Rationale: This tracing is Category II because it features minimal variability and
intermittent variable decelerations. The priority is to initiate conservative
intrauterine resuscitation, such as maternal repositioning, to improve fetal
oxygenation.
Question 3: A 25-year-old G1P0 patient at 41 weeks of gestation presents with a fetal
heart rate tracing showing a baseline of 105 bpm, absent variability, and recurrent
late decelerations with 60% of uterine contractions. How should this tracing be
,classified, and what is the most appropriate immediate action by the healthcare
team?
A. Category II; administer a 500 mL bolus of lactated Ringer's solution.
B. Category III; initiate comprehensive intrauterine resuscitation and prepare for
prompt delivery.
C. Category I; continue monitoring as this is a normal finding for a post-term fetus.
D. Category II; perform fetal scalp stimulation to assess for acidemia.
CORRECT ANSWER: B. Category III; initiate comprehensive intrauterine
resuscitation and prepare for prompt delivery.
Rationale: A tracing with absent variability and recurrent late decelerations is
definitively classified as Category III, which is predictive of abnormal fetal acid-base
status and requires immediate intervention and preparation for delivery.
Question 4: During the active phase of labor, a nurse observes a gradual decrease in
the fetal heart rate that begins early in the contraction, reaches its nadir at the peak
of the contraction, and returns to baseline by the end of the contraction. What is the
primary physiological mechanism responsible for this specific FHR pattern?
A. Umbilical cord compression causing transient vagal stimulation.
B. Uteroplacental insufficiency leading to fetal hypoxemia.
C. Fetal head compression resulting in a transient vagal response.
D. Maternal supine hypotensive syndrome reducing cardiac output.
CORRECT ANSWER: C. Fetal head compression resulting in a transient vagal
response.
Rationale: This pattern describes early decelerations, which are visually apparent,
gradual decreases in FHR that mirror the uterine contraction and are caused by fetal
head compression stimulating the vagus nerve.
Question 5: A laboring patient's EFM tracing demonstrates an abrupt decrease in the
fetal heart rate of 40 bpm below the baseline, with the onset to nadir occurring in
less than 30 seconds. The deceleration varies in shape and does not consistently
mirror the uterine contractions. What is the most likely etiology of this FHR pattern?
A. Fetal head compression during cervical dilation.
B. Umbilical cord compression between the fetus and the uterine wall or pelvis.
C. Transient reduction in uteroplacental blood flow during peak contraction.
D. Maternal administration of an epidural analgesic.
CORRECT ANSWER: B. Umbilical cord compression between the fetus and the
uterine wall or pelvis.
Rationale: The description matches variable decelerations, which are characterized
by an abrupt decrease in FHR (onset to nadir < 30 seconds) and are primarily
caused by umbilical cord compression.
,Question 6: A 30-year-old patient at 38 weeks of gestation is receiving an epidural
for pain management. Shortly after the epidural is placed, the nurse notes a
sustained drop in the fetal heart rate to 90 bpm that lasts for 3 minutes before
gradually returning to the previous baseline of 135 bpm. How should this event be
classified?
A. Early deceleration
B. Late deceleration
C. Variable deceleration
D. Prolonged deceleration
CORRECT ANSWER: D. Prolonged deceleration
Rationale: A prolonged deceleration is defined as a visually apparent decrease in
the FHR of at least 15 bpm below the baseline, lasting for 2 minutes or more but less
than 10 minutes. A drop lasting 3 minutes fits this definition.
Question 7: A nurse is evaluating a fetal heart rate tracing and notes a baseline of 165
bpm that has been sustained for the past 15 minutes. The variability is moderate, and
there are no decelerations. Which of the following maternal conditions is most likely
contributing to this specific fetal heart rate pattern?
A. Maternal hypothermia
B. Maternal fever or chorioamnionitis
C. Maternal administration of magnesium sulfate
D. Maternal hypoglycemia
CORRECT ANSWER: B. Maternal fever or chorioamnionitis
Rationale: Fetal tachycardia is defined as a baseline FHR greater than 160 bpm
sustained for at least 10 minutes. Maternal fever and intra-amniotic infection
(chorioamnionitis) are common causes of fetal tachycardia due to an increased fetal
metabolic rate.
Question 8: A patient at 34 weeks of gestation is being monitored for preterm labor.
The nurse observes a fetal heart rate baseline of 100 bpm sustained for 12 minutes,
with moderate variability and no decelerations. Which of the following is the most
appropriate interpretation of this finding?
A. Normal fetal sleep cycle
B. Fetal bradycardia requiring immediate delivery
C. Fetal bradycardia, which may be normal for a preterm fetus or related to maternal
medications
D. Category III tracing requiring scalp blood sampling
CORRECT ANSWER: C. Fetal bradycardia, which may be normal for a preterm
fetus or related to maternal medications
, Rationale: Fetal bradycardia is a baseline < 110 bpm. While it can indicate hypoxia,
in a preterm fetus or in the presence of certain medications (like magnesium sulfate
or beta-blockers), it may be a benign finding if variability remains moderate and
there are no decelerations.
Question 9: The nurse is assessing fetal heart rate variability and notes an amplitude
range of fluctuation that is visually undetectable. The baseline is 130 bpm, and there
are recurrent late decelerations. What is the clinical significance of this specific
variability pattern?
A. It indicates a well-oxygenated fetus with an intact autonomic nervous system.
B. It suggests the fetus is in a normal sleep cycle and requires stimulation.
C. It is highly predictive of fetal metabolic acidemia and central nervous system
depression.
D. It is a normal variant in post-term pregnancies and requires no intervention.
CORRECT ANSWER: C. It is highly predictive of fetal metabolic acidemia and
central nervous system depression.
Rationale: Absent variability, especially when combined with recurrent late
decelerations, is a Category III finding that strongly predicts fetal metabolic
acidemia and requires immediate clinical intervention.
Question 10: A laboring patient's EFM tracing shows a smooth, undulating, wave-like
pattern in the fetal heart rate baseline with a fixed cycle frequency of 3 to 5 cycles
per minute, persisting for 25 minutes. The variability is absent. What is the most
likely underlying pathophysiological condition associated with this tracing?
A. Acute umbilical cord prolapse
B. Severe fetal anemia
C. Maternal opioid administration
D. Fetal head engagement in the pelvis
CORRECT ANSWER: B. Severe fetal anemia
Rationale: A true sinusoidal pattern is characterized by a smooth, undulating, wave-
like baseline with absent variability. It is classically associated with severe fetal
anemia, such as from Rh isoimmunization or massive fetomaternal hemorrhage, and
is a Category III tracing.
Question 11: A nurse is calculating Montevideo units (MVUs) to assess the adequacy
of uterine activity in a patient receiving oxytocin. Over a 10-minute window, there
are 4 contractions with peak intensities of 55, 60, 50, and 65 mmHg. The resting tone
is 15 mmHg. What is the total MVU count, and is it adequate for active labor?
A. 130 MVUs; inadequate
B. 155 MVUs; inadequate
Questions and Answers with Rationales
Question 1: A 28-year-old G1P0 patient at 39 weeks of gestation is admitted to the
labor and delivery unit in active labor. The nurse initiates continuous electronic fetal
monitoring (EFM) and observes a fetal heart rate (FHR) baseline of 140 bpm,
moderate variability, the presence of accelerations, and an absence of
decelerations. Based on the standardized three-tier FHR interpretation system
established by ACOG and NICHD, how should this tracing be classified, and what is
the most appropriate nursing action?
A. Category I; continue routine monitoring and provide standard labor care.
B. Category II; initiate intrauterine resuscitation measures immediately.
C. Category III; prepare the patient for an emergency cesarean delivery.
D. Category II; apply a fetal scalp electrode to obtain a more accurate tracing.
CORRECT ANSWER: A. Category I; continue routine monitoring and provide
standard labor care.
Rationale: A Category I tracing is characterized by a baseline of 110-160 bpm,
moderate variability, and the absence of late or variable decelerations. It is
predictive of normal fetal acid-base status, and routine care is indicated.
Question 2: A 32-year-old G3P2 patient at 37 weeks of gestation is receiving an
oxytocin infusion for labor augmentation. The nurse notes a fetal heart rate baseline
of 135 bpm with minimal variability, no accelerations, and intermittent variable
decelerations. According to the NICHD guidelines, how should this tracing be
classified, and what is the priority nursing intervention?
A. Category I; increase the oxytocin infusion rate.
B. Category II; reposition the mother and evaluate for intrauterine resuscitation
measures.
C. Category III; immediately discontinue oxytocin and prepare for operative
delivery.
D. Category II; apply a fetal scalp electrode to confirm the baseline heart rate.
CORRECT ANSWER: B. Category II; reposition the mother and evaluate for
intrauterine resuscitation measures.
Rationale: This tracing is Category II because it features minimal variability and
intermittent variable decelerations. The priority is to initiate conservative
intrauterine resuscitation, such as maternal repositioning, to improve fetal
oxygenation.
Question 3: A 25-year-old G1P0 patient at 41 weeks of gestation presents with a fetal
heart rate tracing showing a baseline of 105 bpm, absent variability, and recurrent
late decelerations with 60% of uterine contractions. How should this tracing be
,classified, and what is the most appropriate immediate action by the healthcare
team?
A. Category II; administer a 500 mL bolus of lactated Ringer's solution.
B. Category III; initiate comprehensive intrauterine resuscitation and prepare for
prompt delivery.
C. Category I; continue monitoring as this is a normal finding for a post-term fetus.
D. Category II; perform fetal scalp stimulation to assess for acidemia.
CORRECT ANSWER: B. Category III; initiate comprehensive intrauterine
resuscitation and prepare for prompt delivery.
Rationale: A tracing with absent variability and recurrent late decelerations is
definitively classified as Category III, which is predictive of abnormal fetal acid-base
status and requires immediate intervention and preparation for delivery.
Question 4: During the active phase of labor, a nurse observes a gradual decrease in
the fetal heart rate that begins early in the contraction, reaches its nadir at the peak
of the contraction, and returns to baseline by the end of the contraction. What is the
primary physiological mechanism responsible for this specific FHR pattern?
A. Umbilical cord compression causing transient vagal stimulation.
B. Uteroplacental insufficiency leading to fetal hypoxemia.
C. Fetal head compression resulting in a transient vagal response.
D. Maternal supine hypotensive syndrome reducing cardiac output.
CORRECT ANSWER: C. Fetal head compression resulting in a transient vagal
response.
Rationale: This pattern describes early decelerations, which are visually apparent,
gradual decreases in FHR that mirror the uterine contraction and are caused by fetal
head compression stimulating the vagus nerve.
Question 5: A laboring patient's EFM tracing demonstrates an abrupt decrease in the
fetal heart rate of 40 bpm below the baseline, with the onset to nadir occurring in
less than 30 seconds. The deceleration varies in shape and does not consistently
mirror the uterine contractions. What is the most likely etiology of this FHR pattern?
A. Fetal head compression during cervical dilation.
B. Umbilical cord compression between the fetus and the uterine wall or pelvis.
C. Transient reduction in uteroplacental blood flow during peak contraction.
D. Maternal administration of an epidural analgesic.
CORRECT ANSWER: B. Umbilical cord compression between the fetus and the
uterine wall or pelvis.
Rationale: The description matches variable decelerations, which are characterized
by an abrupt decrease in FHR (onset to nadir < 30 seconds) and are primarily
caused by umbilical cord compression.
,Question 6: A 30-year-old patient at 38 weeks of gestation is receiving an epidural
for pain management. Shortly after the epidural is placed, the nurse notes a
sustained drop in the fetal heart rate to 90 bpm that lasts for 3 minutes before
gradually returning to the previous baseline of 135 bpm. How should this event be
classified?
A. Early deceleration
B. Late deceleration
C. Variable deceleration
D. Prolonged deceleration
CORRECT ANSWER: D. Prolonged deceleration
Rationale: A prolonged deceleration is defined as a visually apparent decrease in
the FHR of at least 15 bpm below the baseline, lasting for 2 minutes or more but less
than 10 minutes. A drop lasting 3 minutes fits this definition.
Question 7: A nurse is evaluating a fetal heart rate tracing and notes a baseline of 165
bpm that has been sustained for the past 15 minutes. The variability is moderate, and
there are no decelerations. Which of the following maternal conditions is most likely
contributing to this specific fetal heart rate pattern?
A. Maternal hypothermia
B. Maternal fever or chorioamnionitis
C. Maternal administration of magnesium sulfate
D. Maternal hypoglycemia
CORRECT ANSWER: B. Maternal fever or chorioamnionitis
Rationale: Fetal tachycardia is defined as a baseline FHR greater than 160 bpm
sustained for at least 10 minutes. Maternal fever and intra-amniotic infection
(chorioamnionitis) are common causes of fetal tachycardia due to an increased fetal
metabolic rate.
Question 8: A patient at 34 weeks of gestation is being monitored for preterm labor.
The nurse observes a fetal heart rate baseline of 100 bpm sustained for 12 minutes,
with moderate variability and no decelerations. Which of the following is the most
appropriate interpretation of this finding?
A. Normal fetal sleep cycle
B. Fetal bradycardia requiring immediate delivery
C. Fetal bradycardia, which may be normal for a preterm fetus or related to maternal
medications
D. Category III tracing requiring scalp blood sampling
CORRECT ANSWER: C. Fetal bradycardia, which may be normal for a preterm
fetus or related to maternal medications
, Rationale: Fetal bradycardia is a baseline < 110 bpm. While it can indicate hypoxia,
in a preterm fetus or in the presence of certain medications (like magnesium sulfate
or beta-blockers), it may be a benign finding if variability remains moderate and
there are no decelerations.
Question 9: The nurse is assessing fetal heart rate variability and notes an amplitude
range of fluctuation that is visually undetectable. The baseline is 130 bpm, and there
are recurrent late decelerations. What is the clinical significance of this specific
variability pattern?
A. It indicates a well-oxygenated fetus with an intact autonomic nervous system.
B. It suggests the fetus is in a normal sleep cycle and requires stimulation.
C. It is highly predictive of fetal metabolic acidemia and central nervous system
depression.
D. It is a normal variant in post-term pregnancies and requires no intervention.
CORRECT ANSWER: C. It is highly predictive of fetal metabolic acidemia and
central nervous system depression.
Rationale: Absent variability, especially when combined with recurrent late
decelerations, is a Category III finding that strongly predicts fetal metabolic
acidemia and requires immediate clinical intervention.
Question 10: A laboring patient's EFM tracing shows a smooth, undulating, wave-like
pattern in the fetal heart rate baseline with a fixed cycle frequency of 3 to 5 cycles
per minute, persisting for 25 minutes. The variability is absent. What is the most
likely underlying pathophysiological condition associated with this tracing?
A. Acute umbilical cord prolapse
B. Severe fetal anemia
C. Maternal opioid administration
D. Fetal head engagement in the pelvis
CORRECT ANSWER: B. Severe fetal anemia
Rationale: A true sinusoidal pattern is characterized by a smooth, undulating, wave-
like baseline with absent variability. It is classically associated with severe fetal
anemia, such as from Rh isoimmunization or massive fetomaternal hemorrhage, and
is a Category III tracing.
Question 11: A nurse is calculating Montevideo units (MVUs) to assess the adequacy
of uterine activity in a patient receiving oxytocin. Over a 10-minute window, there
are 4 contractions with peak intensities of 55, 60, 50, and 65 mmHg. The resting tone
is 15 mmHg. What is the total MVU count, and is it adequate for active labor?
A. 130 MVUs; inadequate
B. 155 MVUs; inadequate
