Obstetrics

Obstetrics questions

10 free obstetrics sample questions across 2 subject areas. Full rationales included, no account required.

2 subject areas
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Obstetrics free questions

Subject areas

See the full breadth of obstetrics in the bank, every subject area below. You get 10 free samples to taste the quality.

infectious conditions5labour31

2 subject areas · 36 questions in the full bank · 10 free samples shown

Sample questions

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1

Question 1

infectious conditions · chlamydia

Answer

A 28-year-old primigravida at 20 weeks gestation attends her routine prenatal visit complaining of a persistent, yellowish vaginal discharge for the past week, accompanied by mild vulvar irritation. She denies dysuria or abdominal pain. Her last sexual encounter was approximately one month ago. On examination, her vital signs are stable: temperature 37.0°C, blood pressure 118/72 mmHg, pulse 78/min, respirations 16/min. Pelvic examination reveals a purulent discharge emanating from the cervical os, and the cervix appears erythematous. Cervical motion tenderness is noted, but uterine fundal tenderness is absent. Given these clinical findings and the patient's gestational status, what is the most probable diagnosis and the recommended first-line pharmacologic treatment to initiate during this visit?

Laboratory Results

ParameterValueReference Range
Urine hCGPositiveNegative (non-pregnant)
Urine ProteinNegativeNegative
Urine Red blood cellsNegativeNegative
White Blood Cell Count9.5 x 10^9/L4.0-11.0 x 10^9/L
Hemoglobin125 g/L120-150 g/L
C-reactive protein (CRP)8 mg/L<5 mg/L
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2

Question 2

labour · intrapartum fetal assessment

Answer

A 32-year-old G2P1001 woman at 39 weeks and 2 days gestation presents to the labor and delivery unit reporting regular, painful uterine contractions for the past four hours. She describes the pain as severe, localized to her lower abdomen, and radiating to her back. Her prenatal course has been uncomplicated, and she is currently taking prenatal vitamins. Upon admission, her vital signs are: temperature 36.8°C, blood pressure 135/88 mmHg, pulse 105/min, respirations 20/min, and oxygen saturation 99% on room air. Vaginal examination reveals cervix dilated to 4 cm, 80% effaced, and fetal station -1. Fetal heart rate monitoring is initiated, revealing a baseline rate of 130 bpm with moderate variability. However, repetitive decelerations are observed, consistently commencing after the peak of uterine contractions and returning to baseline only after the contraction has subsided. What is the most appropriate initial management strategy for this patient, and what is the primary fetal complication this tracing may indicate?

Laboratory Results

ParameterValueReference Range
Hemoglobin118 g/L110-140 g/L in third trimester
Hematocrit0.35 L/L0.33-0.41 L/L in third trimester
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3

Question 3

infectious conditions · herpes gestationis

Answer

A 32-year-old G3P2 woman at 37 weeks gestation presents to her obstetrician's office reporting a progressively worsening 5-day history of intensely pruritic, erythematous papules and tense blisters that began on her abdomen and has since spread to her trunk and proximal extremities. She reports that a similar, albeit milder, rash occurred during her second pregnancy which resolved postpartum. Her current pregnancy has been otherwise uncomplicated. She denies any recent medication changes, fever, or sick contacts. Her vital signs are stable: temperature 36.8°C, blood pressure 125/80 mmHg, pulse 88/min, respirations 16/min, and oxygen saturation 99% on room air. Physical examination reveals widespread urticarial plaques with numerous tense vesicles and bullae, some intact and some ruptured with overlying crusting, primarily on the periumbilical abdomen, trunk, and inner thighs, notably sparing the mucous membranes, palms, and soles. Given her presentation and the potential for fetal implications, what is the most likely diagnosis and the most appropriate initial management strategy?

Laboratory Results

ParameterValueReference Range
White Blood Cell (WBC) Count8.5 x 10^9/L4.0-11.0 x 10^9/L
Hemoglobin128 g/L120-160 g/L
Platelet Count250 x 10^9/L150-450 x 10^9/L
C-reactive protein (CRP)3.0 mg/L<5.0 mg/L
Eosinophil count0.6 x 10^9/L0.0-0.5 x 10^9/L
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4

Question 4

labour · intrapartum fetal assessment

Answer

A 28-year-old primigravid woman, at 40 weeks and 5 days gestation, is admitted to the labor and delivery unit for scheduled induction of labor due to a history of well-controlled gestational hypertension and late-onset gestational diabetes managed with diet. Upon admission, her vitals are: temperature 37.1 C, blood pressure 145/85 mmHg, pulse 92/min, respirations 18/min. Fetal heart rate baseline is 145 bpm. After establishing an IV and initiating oxytocin infusion, an epidural catheter is placed. Two hours into active labor, continuous electronic fetal monitoring displays a pattern consistent with Figure A. The patient reports adequate pain control and denies any new symptoms. What is the most accurate interpretation of the fetal heart tracing, and what is the immediate appropriate management plan?

Laboratory Results

ParameterValueReference Range
Hemoglobin128 g/L120-160 g/L
Platelets240 x 10^9/L150-400 x 10^9/L
Urine DipstickProtein 1+Negative
Random Plasma Glucose5.5 mmol/L<7.8 mmol/L
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5

Question 5

infectious conditions · herpes gestationis

Answer

A 28-year-old G1P0 woman at 39 weeks gestation arrives at the labor and delivery unit, reporting regular, painful uterine contractions every 3-4 minutes and a new onset of severe vaginal discomfort for the past 12 hours. She has a history of well-controlled asthma and has been taking her prenatal vitamins. On obstetric examination, her cervix is found to be 6 cm dilated and 80% effaced. A visual inspection reveals multiple clustered, shallow, ulcerative lesions on the vulva and perineum, some with a vesicular appearance. Her membranes are intact. What is the most likely diagnosis for her vaginal lesions, and what is the optimal delivery plan to minimize neonatal risks?

Laboratory Results

ParameterValueReference Range
White Blood Cell Count (WBC)8.9 x 10^9/L4.0-10.0 x 10^9/L
Hemoglobin (Hb)128 g/L120-160 g/L
Platelets250 x 10^9/L150-450 x 10^9/L
C-reactive protein (CRP)< 5 mg/L< 5 mg/L
Vaginal Swab PCRPositive for Herpes Simplex Virus Type 2Negative
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6

Question 6

labour · intrapartum fetal assessment

Answer

A 32-year-old G1P0 at 38 weeks of gestation presents to the obstetric triage unit with 4 hours of periodic contractions. She reports a clear gush of fluid about 30 minutes prior to arrival, followed by a scant amount of bloody show. On the way to the hospital, contractions intensified, becoming more frequent and painful. She notes consistent fetal movement throughout this period. Her medical history includes well-controlled chronic hypertension, which has remained stable without complications during pregnancy. Upon admission to the labor floor, her vital signs are temperature 36.9°C, blood pressure 122/80 mmHg, pulse 78/min, and respirations 16/min. A speculum examination confirms ruptured membranes, with a pool of clear fluid in the vaginal vault. A digital cervical examination reveals the cervix is 7 centimeters dilated, 90% effaced, and the fetal head is at -1 station. An intrapartum fetal heart rate tracing is obtained, as shown in Figure A. Considering her stable labor progress and the observed fetal heart rate pattern, what is the most appropriate next step in management, and what is the underlying physiological mechanism for this specific tracing?

Laboratory Results

ParameterValueReference Range
Hemoglobin125 g/L110-140 g/L
White Blood Cell Count11.5 x 10^9/L4.5-15.0 x 10^9/L (in labor)
Platelets250 x 10^9/L150-400 x 10^9/L
Urine DipstickNegative for protein and glucoseNegative
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7

Question 7

labour · presentation

Answer

A 28-year-old primigravida at 39 weeks gestation presents to the labor and delivery unit after experiencing regular uterine contractions for the past four hours. She describes the contractions as increasing in intensity and frequency, now occurring every 3-4 minutes. She reports a history of mild pelvic discomfort and spotting earlier in the day following a minor slip on a wet surface at home, but denies any significant trauma or gush of fluid. Her pregnancy has been uneventful, aside from mild gestational hypertension well-controlled with lifestyle modifications. On arrival, she states the fetal movements are robust. A focused physical examination reveals a soft, non-tender abdomen. Initial vaginal examination shows a cervix that is 4 cm dilated, 80% effaced, and the fetal head is at -1 station, with a small amount of blood-tinged mucus noted. The external fetal monitor displays a reassuring tracing with a baseline heart rate of 140 bpm, moderate variability, and accelerations, with no decelerations. What is the most likely diagnosis, and what immediate management step should be undertaken?

Laboratory Results

ParameterValueReference Range
Hemoglobin125 g/L120-160 g/L
White Blood Cell Count9.5 x 10^9/L4.0-11.0 x 10^9/L
Platelets250 x 10^9/L150-450 x 10^9/L
UrinalysisNegative for protein, glucose, leukocytes, nitritesNegative
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8

Question 8

labour · intrapartum fetal assessment

Answer

A 30-year-old primigravida at 38 weeks gestation is admitted to the labor and delivery unit experiencing regular, painful uterine contractions every 3-4 minutes, lasting 60 seconds. She reports spontaneous rupture of membranes with a gush of clear fluid approximately 45 minutes prior to arrival. Her prenatal course has been uncomplicated. Vital signs on admission are: temperature 37.0°C, pulse 98/min, blood pressure 118/78 mmHg, and respiratory rate 16/min. Vaginal examination reveals the cervix to be 6 cm dilated, 90% effaced, and the fetal head at 0 station. Fetal heart rate monitoring, depicted in the provided tracing, consistently shows abrupt decelerations that are often unassociated with contractions, rapidly returning to baseline. Given these findings, what is the most likely underlying diagnosis for the fetal heart rate pattern and the most appropriate immediate management strategy?

Laboratory Results

ParameterValueReference Range
White Blood Cell Count9.5 x 10^9/L4.0-11.0 x 10^9/L
Hemoglobin135 g/L120-160 g/L
Platelets250 x 10^9/L150-450 x 10^9/L
Serum Creatinine65 mcmol/L44-88 mcmol/L
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9

Question 9

labour · postpartum endometritis

Answer

A 28-year-old woman presents to her obstetrician's outpatient clinic for a follow-up visit, three days after an uncomplicated full-term cesarean delivery performed due to a prolonged second stage of labor. She reports persistent low-grade fever at home, accompanied by increasing lower abdominal cramping and general malaise over the past 24 hours. She describes a new onset of a foul-smelling vaginal discharge. Her temperature is 38.8°C, blood pressure is 115/65 mmHg, pulse is 98/min, and respirations are 18/min. On examination, the abdominal incision appears clean and dry without erythema or induration. However, significant tenderness to palpation is elicited over the uterine fundus. A speculum examination reveals a moderate amount of yellowish, malodorous lochia. Relevant laboratory studies were obtained prior to her visit. Based on these findings, what is the most likely diagnosis, and what is the immediate, appropriate initial management plan?

Laboratory Results

ParameterValueReference Range
Hemoglobin125 g/L120-150 g/L
Hematocrit0.380.36-0.45
Leukocyte count15.5 x 10^9/L4.0-11.0 x 10^9/L
Platelet count210 x 10^9/L150-400 x 10^9/L
C-reactive protein (CRP)95 mg/L<10 mg/L
Erythrocyte Sedimentation Rate (ESR)60 mm/hr0-20 mm/hr
Urinalysis: Proteinnegativenegative
Urinalysis: Glucosenegativenegative
Urinalysis: RBC0/hpf0-2/hpf
Urinalysis: WBC0/hpf0-5/hpf
Urinalysis: Leukocyte esterasenegativenegative
Urinalysis: Nitritesnegativenegative
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10

Question 10

labour · intrapartum fetal assessment

Answer

A 28-year-old gravida 1 para 0 woman presents to the outpatient clinic at 34 weeks gestation, reporting a noticeable reduction in fetal movements over the past 24 hours. Her medical history includes well-controlled chronic hypertension, but her blood pressure today is recorded at 145/95 mmHg. She denies experiencing headaches, visual disturbances, or epigastric pain. A non-stress test (NST) performed in the clinic shows a baseline fetal heart rate of 140 beats per minute with minimal variability, and only one acceleration of 10 beats per minute lasting for 10 seconds observed over a 40-minute period. Her previous pregnancy was uncomplicated. What is the most appropriate initial diagnostic assessment and subsequent management plan for this patient?

Laboratory Results

ParameterValueReference Range
Hemoglobin12.5 g/dL11.0-15.0 g/dL
Platelets200 x 10^9/L150-450 x 10^9/L
Serum Creatinine65 µmol/L44-88 µmol/L
UrinalysisNegative for proteinNegative
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