NCC ELECTRONIC FETAL
MONITORING CERTIFICATION FINAL
QUESTIONS AND ANSWERS
1. Which physiological mechanism is primarily responsible for the baseline fetal heart rate?
A. Direct stimulation by amniotic fluid pressure
B. Exclusively the maternal adrenal response
C. The fetal respiratory drive
D. Sympathetic and parasympathetic nervous system interaction
Answer: D
Conceptual Explanation: The fetal heart rate baseline is regulated by the balance between
the sympathetic (increases HR) and parasympathetic (decreases HR via the vagus nerve)
nervous systems.
2. What is the definition of uterine tachysystole?
A. More than 3 contractions in 10 minutes
B. More than 5 contractions in 10 minutes, averaged over a 30-minute window
C. Contractions lasting longer than 120 seconds each
,D. Contractions with less than 30 seconds of rest between them
Answer: B
Conceptual Explanation: Uterine tachysystole is defined as more than 5 contractions in
10 minutes, averaged over 30 minutes. It should be qualified by the presence or absence of
FHR decelerations.
3. A fetal heart rate pattern characterized by moderate variability and recurrent late
decelerations is classified as:
A. Category II
B. Category I
C. Category III
D. Category IV
Answer: A
Conceptual Explanation: Recurrent late decelerations with moderate variability are
Category II. Category III requires absent variability along with recurrent lates, variables, or
bradycardia.
4. Which of the following is a primary cause of fetal respiratory acidosis?
A. Accumulation of lactic acid due to anaerobic metabolism
B. Maternal hyperventilation
C. Excessive bicarbonate production
, D. Accumulation of carbon dioxide (CO2)
Answer: D
Conceptual Explanation: Respiratory acidosis is caused by the buildup of CO2, which
combines with water to form carbonic acid, typically due to interrupted umbilical blood
flow.
5. The physiological mechanism behind a variable deceleration is:
A. Head compression causing a vagal response
B. Uteroplacental insufficiency
C. Fetal hypotension
D. Umbilical cord compression
Answer: D
Conceptual Explanation: Variable decelerations are caused by umbilical cord
compression, which triggers baroreceptor and chemoreceptor responses.
6. At what gestational age is an acceleration defined as a 10 bpm increase for 10 seconds?
A. Less than 32 weeks
B. Greater than 37 weeks
C. Between 32 and 36 weeks
D. At any gestational age
MONITORING CERTIFICATION FINAL
QUESTIONS AND ANSWERS
1. Which physiological mechanism is primarily responsible for the baseline fetal heart rate?
A. Direct stimulation by amniotic fluid pressure
B. Exclusively the maternal adrenal response
C. The fetal respiratory drive
D. Sympathetic and parasympathetic nervous system interaction
Answer: D
Conceptual Explanation: The fetal heart rate baseline is regulated by the balance between
the sympathetic (increases HR) and parasympathetic (decreases HR via the vagus nerve)
nervous systems.
2. What is the definition of uterine tachysystole?
A. More than 3 contractions in 10 minutes
B. More than 5 contractions in 10 minutes, averaged over a 30-minute window
C. Contractions lasting longer than 120 seconds each
,D. Contractions with less than 30 seconds of rest between them
Answer: B
Conceptual Explanation: Uterine tachysystole is defined as more than 5 contractions in
10 minutes, averaged over 30 minutes. It should be qualified by the presence or absence of
FHR decelerations.
3. A fetal heart rate pattern characterized by moderate variability and recurrent late
decelerations is classified as:
A. Category II
B. Category I
C. Category III
D. Category IV
Answer: A
Conceptual Explanation: Recurrent late decelerations with moderate variability are
Category II. Category III requires absent variability along with recurrent lates, variables, or
bradycardia.
4. Which of the following is a primary cause of fetal respiratory acidosis?
A. Accumulation of lactic acid due to anaerobic metabolism
B. Maternal hyperventilation
C. Excessive bicarbonate production
, D. Accumulation of carbon dioxide (CO2)
Answer: D
Conceptual Explanation: Respiratory acidosis is caused by the buildup of CO2, which
combines with water to form carbonic acid, typically due to interrupted umbilical blood
flow.
5. The physiological mechanism behind a variable deceleration is:
A. Head compression causing a vagal response
B. Uteroplacental insufficiency
C. Fetal hypotension
D. Umbilical cord compression
Answer: D
Conceptual Explanation: Variable decelerations are caused by umbilical cord
compression, which triggers baroreceptor and chemoreceptor responses.
6. At what gestational age is an acceleration defined as a 10 bpm increase for 10 seconds?
A. Less than 32 weeks
B. Greater than 37 weeks
C. Between 32 and 36 weeks
D. At any gestational age
