RNC OB INPATIENT OB CERTIFICATION | ACTUAL EXAM QUESTIONS
AND ANSWERS WITH COMPLETE SOLUTIONS
Question 1
What is the primary cause of pain experienced by a woman during the first stage of labor?
A) Distention of the pelvic floor muscles.
B) Pressure of the fetal presenting part on the rectum and bladder.
C) Stretching of the cervix and lower uterine segment, and traction on surrounding ligaments.
D) Uterine muscle hypoxia from intense contractions.
E) Episiotomy incision.
Correct Answer: C) Stretching of the cervix and lower uterine segment, and traction on
surrounding ligaments.
Rationale: During the first stage of labor, the primary source of pain is visceral pain
originating from the forceful contractions of the uterus causing cervical dilation and
effacement, and the stretching of the lower uterine segment. Traction on the ovaries,
fallopian tubes, and uterine ligaments also contributes.
Question 2
A pregnant client with chronic hypertension requires antihypertensive therapy. Which class of
antihypertensive drugs is generally contraindicated during pregnancy due to its known
teratogenic effects?
A) Calcium channel blockers
B) Beta-blockers
C) ACE inhibitors
D) Methyldopa
E) Labetalol
Correct Answer: C) ACE inhibitors
Rationale: Angiotensin-converting enzyme (ACE) inhibitors are known to cause significant
fetal harm, including renal dysfunction, oligohydramnios, and skeletal malformations,
particularly when used in the second and third trimesters. They are therefore
contraindicated in pregnancy.
Question 3
A woman who develops gestational diabetes mellitus (GDM) during pregnancy should be
,[Type here]
counseled about an increased risk for which long-term health condition?
A) The development of overt diabetes in later life.
B) A future pregnancy with a macrosomic infant.
C) Giving birth to an infant with a congenital heart defect.
D) Chronic hypertension.
E) Recurrent GDM in all future pregnancies.
Correct Answer: A) The development of overt diabetes in later life.
Rationale: While GDM typically resolves after delivery, it is a significant predictor of future
metabolic disease. Women with a history of GDM have a substantially increased risk of
developing Type 2 diabetes later in life and should undergo regular screening postpartum.
Question 4
A pregnant client with preeclampsia reports a new onset of severe, persistent right upper
quadrant pain. The nurse recognizes this symptom as a potential sign of:
A) Progression of preeclampsia to eclampsia.
B) Normal discomfort of late pregnancy.
C) Gallbladder disease.
D) The onset of labor.
E) A urinary tract infection.
Correct Answer: A) Progression of preeclampsia to eclampsia.
Rationale: Epigastric or right upper quadrant pain in a patient with preeclampsia is an
ominous sign. It indicates liver involvement (hepatic swelling or hemorrhage) and is a
feature of severe disease, suggesting that the condition is worsening and may be progressing
toward eclampsia or HELLP syndrome.
Question 5
Which of the following is a predisposing risk factor for the development of preeclampsia?
A) Nulliparity (first pregnancy)
B) Pre-existing hypertension
C) Previous history of preeclampsia
D) All of the above
E) Multiparity
,[Type here]
Correct Answer: D) All of the above
Rationale: The risk factors for preeclampsia are multifactorial. Key predisposing factors
include being a first-time mother (nulliparity), having a prior history of preeclampsia, pre-
existing conditions like chronic hypertension and diabetes, and obesity.
Question 6
A client is receiving an intravenous infusion of magnesium sulfate for preeclampsia. Which of
the following signs would indicate that the client is experiencing magnesium toxicity?
A) Hyperactive deep tendon reflexes.
B) A respiratory rate of 8 breaths per minute.
C) An increase in blood pressure.
D) A urine output of 40 mL per hour.
E) The client reports feeling warm and flushed.
Correct Answer: B) A respiratory rate of 8 breaths per minute.
Rationale: Magnesium sulfate is a central nervous system depressant. The slurring of speech
is an early sign of toxicity. The earliest sign is often the loss of deep tendon reflexes. As
toxicity progresses, it can cause severe respiratory depression (a respiratory rate <12
breaths/min) and ultimately cardiac arrest.
Question 7
The presence of a positive ankle clonus test in a patient with preeclampsia is a result of:
A) Dependent edema in the lower extremities.
B) Increased neuromuscular excitability due to cerebral edema.
C) A decrease in colloid osmotic pressure.
D) A side effect of antihypertensive medication.
E) Hypomagnesemia.
Correct Answer: B) Increased neuromuscular excitability due to cerebral edema.
Rationale: Preeclampsia can cause cerebral vasospasm and edema, leading to central
nervous system irritability. Ankle clonus (rhythmic, involuntary contractions of the foot in
response to dorsiflexion) is a sign of hyperreflexia and indicates a high degree of CNS
irritability, placing the patient at increased risk for an eclamptic seizure.
, [Type here]
Question 8
A pregnant woman is exposed to the varicella (chickenpox) virus just a few days before her
delivery. To protect the newborn from a severe or fatal infection, what is the most appropriate
intervention?
A) Administer acyclovir to the mother before delivery.
B) Administer the chickenpox vaccine to the mother.
C) Administer varicella-zoster immune globulin (VZIG) to the newborn shortly after birth.
D) Administer the chickenpox vaccine to the newborn.
E) There is no effective preventative measure.
Correct Answer: C) Administer varicella-zoster immune globulin (VZIG) to the newborn
shortly after birth.
Rationale: If a mother develops varicella within 5 days before or 2 days after delivery, the
newborn is at high risk for severe neonatal varicella because it has been exposed to the
virus without the benefit of receiving protective maternal antibodies. VZIG provides
passive immunity and can significantly reduce the severity of the disease in the infant.
Question 9
Following a delivery complicated by an abruptio placentae, a clot observation test is performed.
A tube of the mother's blood forms a soft clot that dissolves easily within 20 minutes. This result
is consistent with:
A) A normal coagulation process.
B) The presence of antithrombin III.
C) A platelet dysfunction.
D) Hypofibrinogenemia and disseminated intravascular coagulation (DIC).
E) An elevated D-dimer level.
Correct Answer: D) Hypofibrinogenemia and disseminated intravascular coagulation (DIC).
Rationale: Placental abruption is a major risk factor for DIC, a condition where the clotting
cascade is pathologically activated, consuming clotting factors like fibrinogen. A bedside
clot observation test where a stable clot fails to form is a strong indicator of
hypofibrinogenemia (low fibrinogen levels), a key feature of DIC.
AND ANSWERS WITH COMPLETE SOLUTIONS
Question 1
What is the primary cause of pain experienced by a woman during the first stage of labor?
A) Distention of the pelvic floor muscles.
B) Pressure of the fetal presenting part on the rectum and bladder.
C) Stretching of the cervix and lower uterine segment, and traction on surrounding ligaments.
D) Uterine muscle hypoxia from intense contractions.
E) Episiotomy incision.
Correct Answer: C) Stretching of the cervix and lower uterine segment, and traction on
surrounding ligaments.
Rationale: During the first stage of labor, the primary source of pain is visceral pain
originating from the forceful contractions of the uterus causing cervical dilation and
effacement, and the stretching of the lower uterine segment. Traction on the ovaries,
fallopian tubes, and uterine ligaments also contributes.
Question 2
A pregnant client with chronic hypertension requires antihypertensive therapy. Which class of
antihypertensive drugs is generally contraindicated during pregnancy due to its known
teratogenic effects?
A) Calcium channel blockers
B) Beta-blockers
C) ACE inhibitors
D) Methyldopa
E) Labetalol
Correct Answer: C) ACE inhibitors
Rationale: Angiotensin-converting enzyme (ACE) inhibitors are known to cause significant
fetal harm, including renal dysfunction, oligohydramnios, and skeletal malformations,
particularly when used in the second and third trimesters. They are therefore
contraindicated in pregnancy.
Question 3
A woman who develops gestational diabetes mellitus (GDM) during pregnancy should be
,[Type here]
counseled about an increased risk for which long-term health condition?
A) The development of overt diabetes in later life.
B) A future pregnancy with a macrosomic infant.
C) Giving birth to an infant with a congenital heart defect.
D) Chronic hypertension.
E) Recurrent GDM in all future pregnancies.
Correct Answer: A) The development of overt diabetes in later life.
Rationale: While GDM typically resolves after delivery, it is a significant predictor of future
metabolic disease. Women with a history of GDM have a substantially increased risk of
developing Type 2 diabetes later in life and should undergo regular screening postpartum.
Question 4
A pregnant client with preeclampsia reports a new onset of severe, persistent right upper
quadrant pain. The nurse recognizes this symptom as a potential sign of:
A) Progression of preeclampsia to eclampsia.
B) Normal discomfort of late pregnancy.
C) Gallbladder disease.
D) The onset of labor.
E) A urinary tract infection.
Correct Answer: A) Progression of preeclampsia to eclampsia.
Rationale: Epigastric or right upper quadrant pain in a patient with preeclampsia is an
ominous sign. It indicates liver involvement (hepatic swelling or hemorrhage) and is a
feature of severe disease, suggesting that the condition is worsening and may be progressing
toward eclampsia or HELLP syndrome.
Question 5
Which of the following is a predisposing risk factor for the development of preeclampsia?
A) Nulliparity (first pregnancy)
B) Pre-existing hypertension
C) Previous history of preeclampsia
D) All of the above
E) Multiparity
,[Type here]
Correct Answer: D) All of the above
Rationale: The risk factors for preeclampsia are multifactorial. Key predisposing factors
include being a first-time mother (nulliparity), having a prior history of preeclampsia, pre-
existing conditions like chronic hypertension and diabetes, and obesity.
Question 6
A client is receiving an intravenous infusion of magnesium sulfate for preeclampsia. Which of
the following signs would indicate that the client is experiencing magnesium toxicity?
A) Hyperactive deep tendon reflexes.
B) A respiratory rate of 8 breaths per minute.
C) An increase in blood pressure.
D) A urine output of 40 mL per hour.
E) The client reports feeling warm and flushed.
Correct Answer: B) A respiratory rate of 8 breaths per minute.
Rationale: Magnesium sulfate is a central nervous system depressant. The slurring of speech
is an early sign of toxicity. The earliest sign is often the loss of deep tendon reflexes. As
toxicity progresses, it can cause severe respiratory depression (a respiratory rate <12
breaths/min) and ultimately cardiac arrest.
Question 7
The presence of a positive ankle clonus test in a patient with preeclampsia is a result of:
A) Dependent edema in the lower extremities.
B) Increased neuromuscular excitability due to cerebral edema.
C) A decrease in colloid osmotic pressure.
D) A side effect of antihypertensive medication.
E) Hypomagnesemia.
Correct Answer: B) Increased neuromuscular excitability due to cerebral edema.
Rationale: Preeclampsia can cause cerebral vasospasm and edema, leading to central
nervous system irritability. Ankle clonus (rhythmic, involuntary contractions of the foot in
response to dorsiflexion) is a sign of hyperreflexia and indicates a high degree of CNS
irritability, placing the patient at increased risk for an eclamptic seizure.
, [Type here]
Question 8
A pregnant woman is exposed to the varicella (chickenpox) virus just a few days before her
delivery. To protect the newborn from a severe or fatal infection, what is the most appropriate
intervention?
A) Administer acyclovir to the mother before delivery.
B) Administer the chickenpox vaccine to the mother.
C) Administer varicella-zoster immune globulin (VZIG) to the newborn shortly after birth.
D) Administer the chickenpox vaccine to the newborn.
E) There is no effective preventative measure.
Correct Answer: C) Administer varicella-zoster immune globulin (VZIG) to the newborn
shortly after birth.
Rationale: If a mother develops varicella within 5 days before or 2 days after delivery, the
newborn is at high risk for severe neonatal varicella because it has been exposed to the
virus without the benefit of receiving protective maternal antibodies. VZIG provides
passive immunity and can significantly reduce the severity of the disease in the infant.
Question 9
Following a delivery complicated by an abruptio placentae, a clot observation test is performed.
A tube of the mother's blood forms a soft clot that dissolves easily within 20 minutes. This result
is consistent with:
A) A normal coagulation process.
B) The presence of antithrombin III.
C) A platelet dysfunction.
D) Hypofibrinogenemia and disseminated intravascular coagulation (DIC).
E) An elevated D-dimer level.
Correct Answer: D) Hypofibrinogenemia and disseminated intravascular coagulation (DIC).
Rationale: Placental abruption is a major risk factor for DIC, a condition where the clotting
cascade is pathologically activated, consuming clotting factors like fibrinogen. A bedside
clot observation test where a stable clot fails to form is a strong indicator of
hypofibrinogenemia (low fibrinogen levels), a key feature of DIC.
