2026 2027 COMPREHENSIVE 200 Q&A STUDY GUIDE
WITH RATIONALES
Q1. A 24-year-old primigravida presents at 10 weeks’ gestation by last menstrual period
(LMP). Ultrasound measurement of the crown-rump length (CRL) indicates a gestational age
of 11 weeks and 2 days. Which of the following is the most appropriate management
regarding her estimated date of delivery (EDD)?
A) Retain the EDD calculated by the last menstrual period.
B) Change the EDD to match the ultrasound crown-rump length measurement.
C) Average the LMP date and the ultrasound date to determine a mid-point EDD.
D) Repeat the ultrasound in 4 weeks to re-evaluate interval fetal growth.
Correct Answer: B) Change the EDD to match the ultrasound crown-rump length
measurement.
Explanation: According to ACOG and ACNM guidelines, a first-trimester ultrasound
crown-rump length (CRL) is the most accurate method for establishing gestational age. In
the first trimester (up to 13 6/7 weeks), if the ultrasound dating varies from LMP dating by
more than 7 days, the EDD must be changed to match the ultrasound findings.
Q2. During a routine prenatal visit at 28 weeks' gestation, a patient's antibody screen returns
positive for anti-D antibodies. The patient is Rh-negative. What is the most appropriate next
,step in management?
A) Administer 300 mcg of Rho(D) Immune Globulin (RhoGAM) immediately.
B) Perform a Kleihauer-Betke test to quantify fetal-maternal hemorrhage.
C) Do not administer Rho(D) Immune Globulin and monitor maternal antibody titers.
D) Plan for immediate induction of labor to prevent hydrops fetalis.
Correct Answer: C) Do not administer Rho(D) Immune Globulin and monitor maternal
antibody titers.
Explanation: Rho(D) Immune Globulin is an immunizing agent that prevents
isoimmunization in non-sensitized Rh-negative individuals. If the antibody screen is
already positive for anti-D antibodies, the patient is already sensitized (isoimmunized), and
RhoGAM will provide no clinical benefit. Management shifts to serial maternal antibody
titers and ultrasound monitoring of the fetus for signs of anemia (such as middle cerebral
artery peak systolic velocity assessments).
Q3. A pregnant patient at 16 weeks’ gestation presents with a blood pressure of 142/92
mmHg. Her pre-pregnancy blood pressure was 118/74 mmHg. A repeat measurement 4 hours
later shows a blood pressure of 144/94 mmHg. Her urinalysis is negative for protein. Which
diagnosis is most accurate?
A) Gestational hypertension
B) Preeclampsia without severe features
C) Chronic hypertension
D) White-coat hypertension
Correct Answer: C) Chronic hypertension
Explanation: Hypertension diagnosed before pregnancy or before 20 weeks’ gestation is
classified as chronic hypertension. Gestational hypertension and preeclampsia develop at
or after 20 weeks’ gestation.
Q4. Which of the following laboratory values represents an abnormal screening result for
gestational diabetes mellitus (GDM) during a 1-hour, 50-gram glucose tolerance test (GTT)
conducted at 24 to 28 weeks' gestation?
A) 125 mg/dL
B) 130 mg/dL
C) 135 mg/dL
D) 142 mg/dL
Correct Answer: D) 142 mg/dL
,Explanation: While thresholds can vary slightly between institutions (130 mg/dL vs. 135
mg/dL or 140 mg/dL), a value of 142 mg/dL exceeds all standard diagnostic screening
thresholds for the 1-hour 50g GTT, necessitating a definitive 3-hour diagnostic 100g oral
glucose tolerance test.
Intrapartum Care
Q5. A multiparous patient at 39 weeks' gestation is in active labor. Cervical examination
reveals the cervix is 6 cm dilated, 80% effaced, and the fetal head is at -1 station. Over the
next 4 hours, there is no change in cervical dilation despite strong, palpable uterine
contractions occurring every 3 minutes. What is the most appropriate next step?
A) Perform an immediate emergency cesarean delivery for cephalopelvic disproportion.
B) Initiate an oxytocin infusion to increase contraction frequency.
C) Place an intrauterine pressure catheter (IUPC) to evaluate contraction adequacy in
Montevideo units.
D) Administer therapeutic rest via intravenous morphine sulphate.
Correct Answer: C) Place an intrauterine pressure catheter (IUPC) to evaluate contraction
adequacy in Montevideo units.
Explanation: Before diagnosing an arrest of active labor or implementing high-risk
interventions, contraction adequacy should be quantified objectively. An IUPC measures
uterine activity in Montevideo units (MVUs). Adequate labor is generally defined as
exceeding 200 MVUs over a 10-minute window. If contractions are adequate and arrest is
confirmed, intervention is warranted.
Q6. A laboring patient experiences a sudden gush of fluid followed by profound fetal
bradycardia down to 70 beats per minute lasting longer than 3 minutes. On vaginal
examination, the midwife feels a loop of pulsating tissue ahead of the fetal presenting part.
What is the immediate priority?
A) Instruct the patient to push forcefully with the next contraction to expedite delivery.
B) Manually elevate the fetal presenting part off the umbilical cord and call for emergency
cesarean section.
C) Place the patient in a high semi-Fowler's position to stabilize her blood pressure.
, D) Increase the infusion rate of the main IV line and administer oxygen via a simple face
mask.
Correct Answer: B) Manually elevate the fetal presenting part off the umbilical cord and
call for emergency cesarean section.
Explanation: This scenario describes an umbilical cord prolapse, an obstetric emergency.
The immediate priority is to relieve mechanical compression of the umbilical cord by
keeping a gloved hand in the vagina to push the fetal presenting part upward. The hand
must remain in place until a cesarean section is underway.
Q7. Which of the following fetal heart rate tracing characteristics indicates a reassuring fetal
acid-base status?
A) Repetitive late decelerations with minimal baseline variability.
B) Moderate baseline variability with regular, spontaneous accelerations.
C) Marked baseline variability with intermittent variable decelerations.
D) Sinusoidal baseline pattern lasting for over 30 consecutive minutes.
Correct Answer: B) Moderate baseline variability with regular, spontaneous accelerations.
Explanation: Category I tracings feature moderate baseline variability (6–25 bpm) and
accelerations, which strongly correlate with a normal fetal acid-base status and rule out
current metabolic acidemia.
Postpartum & Newborn Care
Q8. A patient experiences a postpartum hemorrhage immediately following the delivery of a
4,200g infant. The midwife notes a soft, boggy uterine fundus located above the umbilicus
and deviated to the right side. What is the most appropriate first-line action?
A) Administer 0.2 mg of intramuscular methylergonovine (Methergine).
B) Perform bimanual uterine compression.
C) Assist the patient to empty her bladder via straight catheterization.
D) Order a stat type and crossmatch for two units of packed red blood cells.
Correct Answer: C) Assist the patient to empty her bladder via straight catheterization.
Explanation: A uterine fundus that is high, boggy, and deviated to the right is the classic
clinical presentation of uterine atony caused by a distended urinary bladder. Emptying the