ATI Maternal Newborn (OB) Proctored Exam
Prep 2026 | Real Practice Questions,
Answers & Detailed Rationales | LPN/LVN
Nursing Study Guide
• ATI Maternal Newborn (OB) Proctored Exam Prep 2026 — 200 real-style
practice questions with correct answers and detailed EXPERT RATIONALE designed
to mirror the actual ATI proctored exam format for LPN/LVN students.
• How to use this material: Read each question carefully, select your answer
mentally before checking, then study the EXPERT RATIONALE thoroughly — focus
extra time on any question you got wrong or guessed on.
Question 1: A nurse is caring for a client who is 10 weeks pregnant and asks
when she can expect to hear her baby's fetal heart tones using a Doppler
device. What is the nurse's best response?
A. Around 6 weeks gestation
B. Around 8 weeks gestation
C. Around 20 weeks gestation
D. Around 24 weeks gestation
E. Around 16 weeks gestation
✓ Correct Answer: B. Around 8 weeks gestation
EXPERT RATIONALE: Fetal heart tones can typically be detected by Doppler
ultrasound as early as 8–12 weeks gestation. The Doppler device amplifies sound
enough to detect cardiac activity at this early stage, unlike a fetoscope which
requires approximately 16–20 weeks.
Question 2: A nurse is assessing a pregnant client at 38 weeks gestation and
notes a blood pressure of 158/110 mmHg, 3+ proteinuria, and severe
headache. Which condition does the nurse suspect?
A. Gestational hypertension
,B. Chronic hypertension
C. Mild preeclampsia
D. HELLP syndrome
E. Severe preeclampsia
✓ Correct Answer: E. Severe preeclampsia
EXPERT RATIONALE: Severe preeclampsia is characterized by BP ≥160/110 mmHg
on two occasions, significant proteinuria (3+ or more), and severe symptoms such
as headache, visual disturbances, and epigastric pain. This client meets all criteria
for severe preeclampsia.
Question 3: A nurse is teaching a client about the purpose of the alpha-
fetoprotein (AFP) screening test. Which statement best describes this test?
A. It detects chromosomal abnormalities such as Down syndrome only
B. It measures fetal lung maturity
C. It screens for neural tube defects and chromosomal abnormalities
D. It determines the sex of the fetus
E. It evaluates placental function
✓ Correct Answer: C. It screens for neural tube defects and chromosomal
abnormalities
EXPERT RATIONALE: AFP is a protein produced by the fetal liver. Elevated AFP
levels may indicate neural tube defects such as spina bifida or anencephaly. Low
levels may suggest chromosomal disorders like Down syndrome (trisomy 21). It is a
screening, not diagnostic, tool.
Question 4: A nurse is caring for a client in active labor. The fetal monitor
shows late decelerations with each contraction. What is the nurse's priority
action?
,A. Increase the oxytocin infusion rate
B. Place the client in a supine position
C. Notify the provider immediately
D. Reposition the client to the left lateral position and administer oxygen
E. Document the findings and continue monitoring
✓ Correct Answer: D. Reposition the client to the left lateral position and
administer oxygen
EXPERT RATIONALE: Late decelerations indicate uteroplacental insufficiency and
fetal hypoxia. The priority nursing interventions are to reposition the client to the
left lateral position (to relieve aortocaval compression), administer oxygen via face
mask at 8–10 L/min, discontinue oxytocin if infusing, and notify the provider. These
actions address the underlying cause immediately.
Question 5: A nurse is assessing a postpartum client 12 hours after delivery.
The nurse notes the fundus is firm, 2 fingerbreadths above the umbilicus, and
displaced to the right. What is the most likely cause?
A. Uterine atony
B. A full bladder
C. Normal uterine involution
D. Retained placental fragments
E. Uterine infection
✓ Correct Answer: B. A full bladder
EXPERT RATIONALE: A distended bladder is the most common cause of uterine
displacement to the right after delivery. The bladder fills quickly postpartum and
can push the uterus upward and to the right. The nurse should assist the client to
void or catheterize if she cannot void, then reassess the fundus.
, Question 6: A newborn is assessed at 1 minute of life. The nurse notes: heart
rate 110 bpm, weak cry, some flexion, grimace to stimulation, and a pink body
with blue extremities. What is the APGAR score?
A. 5
B. 6
C. 7
D. 8
E. 9
✓ Correct Answer: C. 7
EXPERT RATIONALE: APGAR scoring: Heart rate >100 = 2, Weak cry (respiratory
effort) = 1, Some flexion (muscle tone) = 1, Grimace (reflex irritability) = 1, Pink
body/blue extremities (color/acrocyanosis) = 1. Total = 7. A score of 7–10 indicates a
vigorous newborn.
Question 7: A nurse is caring for a client receiving magnesium sulfate for
preeclampsia. Which finding requires the nurse to stop the infusion
immediately?
A. Urinary output of 35 mL/hr
B. Respiratory rate of 10 breaths/min
C. Deep tendon reflexes rated 2+
D. Blood pressure of 148/96 mmHg
E. Mild flushing and warmth
✓ Correct Answer: B. Respiratory rate of 10 breaths/min
EXPERT RATIONALE: Magnesium sulfate toxicity can cause respiratory depression,
which is life-threatening. A respiratory rate below 12 breaths/min is a critical sign of
toxicity. The nurse must stop the infusion, notify the provider, and have calcium
Prep 2026 | Real Practice Questions,
Answers & Detailed Rationales | LPN/LVN
Nursing Study Guide
• ATI Maternal Newborn (OB) Proctored Exam Prep 2026 — 200 real-style
practice questions with correct answers and detailed EXPERT RATIONALE designed
to mirror the actual ATI proctored exam format for LPN/LVN students.
• How to use this material: Read each question carefully, select your answer
mentally before checking, then study the EXPERT RATIONALE thoroughly — focus
extra time on any question you got wrong or guessed on.
Question 1: A nurse is caring for a client who is 10 weeks pregnant and asks
when she can expect to hear her baby's fetal heart tones using a Doppler
device. What is the nurse's best response?
A. Around 6 weeks gestation
B. Around 8 weeks gestation
C. Around 20 weeks gestation
D. Around 24 weeks gestation
E. Around 16 weeks gestation
✓ Correct Answer: B. Around 8 weeks gestation
EXPERT RATIONALE: Fetal heart tones can typically be detected by Doppler
ultrasound as early as 8–12 weeks gestation. The Doppler device amplifies sound
enough to detect cardiac activity at this early stage, unlike a fetoscope which
requires approximately 16–20 weeks.
Question 2: A nurse is assessing a pregnant client at 38 weeks gestation and
notes a blood pressure of 158/110 mmHg, 3+ proteinuria, and severe
headache. Which condition does the nurse suspect?
A. Gestational hypertension
,B. Chronic hypertension
C. Mild preeclampsia
D. HELLP syndrome
E. Severe preeclampsia
✓ Correct Answer: E. Severe preeclampsia
EXPERT RATIONALE: Severe preeclampsia is characterized by BP ≥160/110 mmHg
on two occasions, significant proteinuria (3+ or more), and severe symptoms such
as headache, visual disturbances, and epigastric pain. This client meets all criteria
for severe preeclampsia.
Question 3: A nurse is teaching a client about the purpose of the alpha-
fetoprotein (AFP) screening test. Which statement best describes this test?
A. It detects chromosomal abnormalities such as Down syndrome only
B. It measures fetal lung maturity
C. It screens for neural tube defects and chromosomal abnormalities
D. It determines the sex of the fetus
E. It evaluates placental function
✓ Correct Answer: C. It screens for neural tube defects and chromosomal
abnormalities
EXPERT RATIONALE: AFP is a protein produced by the fetal liver. Elevated AFP
levels may indicate neural tube defects such as spina bifida or anencephaly. Low
levels may suggest chromosomal disorders like Down syndrome (trisomy 21). It is a
screening, not diagnostic, tool.
Question 4: A nurse is caring for a client in active labor. The fetal monitor
shows late decelerations with each contraction. What is the nurse's priority
action?
,A. Increase the oxytocin infusion rate
B. Place the client in a supine position
C. Notify the provider immediately
D. Reposition the client to the left lateral position and administer oxygen
E. Document the findings and continue monitoring
✓ Correct Answer: D. Reposition the client to the left lateral position and
administer oxygen
EXPERT RATIONALE: Late decelerations indicate uteroplacental insufficiency and
fetal hypoxia. The priority nursing interventions are to reposition the client to the
left lateral position (to relieve aortocaval compression), administer oxygen via face
mask at 8–10 L/min, discontinue oxytocin if infusing, and notify the provider. These
actions address the underlying cause immediately.
Question 5: A nurse is assessing a postpartum client 12 hours after delivery.
The nurse notes the fundus is firm, 2 fingerbreadths above the umbilicus, and
displaced to the right. What is the most likely cause?
A. Uterine atony
B. A full bladder
C. Normal uterine involution
D. Retained placental fragments
E. Uterine infection
✓ Correct Answer: B. A full bladder
EXPERT RATIONALE: A distended bladder is the most common cause of uterine
displacement to the right after delivery. The bladder fills quickly postpartum and
can push the uterus upward and to the right. The nurse should assist the client to
void or catheterize if she cannot void, then reassess the fundus.
, Question 6: A newborn is assessed at 1 minute of life. The nurse notes: heart
rate 110 bpm, weak cry, some flexion, grimace to stimulation, and a pink body
with blue extremities. What is the APGAR score?
A. 5
B. 6
C. 7
D. 8
E. 9
✓ Correct Answer: C. 7
EXPERT RATIONALE: APGAR scoring: Heart rate >100 = 2, Weak cry (respiratory
effort) = 1, Some flexion (muscle tone) = 1, Grimace (reflex irritability) = 1, Pink
body/blue extremities (color/acrocyanosis) = 1. Total = 7. A score of 7–10 indicates a
vigorous newborn.
Question 7: A nurse is caring for a client receiving magnesium sulfate for
preeclampsia. Which finding requires the nurse to stop the infusion
immediately?
A. Urinary output of 35 mL/hr
B. Respiratory rate of 10 breaths/min
C. Deep tendon reflexes rated 2+
D. Blood pressure of 148/96 mmHg
E. Mild flushing and warmth
✓ Correct Answer: B. Respiratory rate of 10 breaths/min
EXPERT RATIONALE: Magnesium sulfate toxicity can cause respiratory depression,
which is life-threatening. A respiratory rate below 12 breaths/min is a critical sign of
toxicity. The nurse must stop the infusion, notify the provider, and have calcium
