OBGYN ARDMS 2026 QUESTIONS AND ANSWERS
SURE A+
✔✔A. Amniocentesis - ✔✔116. Which of the following procedures can rule out Down
syndrome in at-risk patients?
A. Amniocentesis
B. Biophysical profile
C. Quad screen
D. Ultrasound
E. Vesicocentesis
✔✔E.37 - ✔✔117. Physicians usually do not start to consider a cesarean section due to
placenta previa untl week
A. 21
B. 25
C. 30
D. 32
E. 37
✔✔E. 33-35 weeks' gestation - ✔✔118. The distal femoral epiphysis is demonstrable
sonographically at:
A. 14-16 weeks' gestation
B. 18-20 weeks' gestation
,C. 22-24 weeks' gestation
D. 28-30 weeks' gestation
E. 33-35 weeks' gestation
✔✔D. A and B - ✔✔119. A volume scan of the fetal heart acquired in the four-chamber
plane will allow you also to demonstrate
A. Outflow tracts
B. Aortic and ductal arches
C. Inferior vena cava
D. A and B
E. None of the above
✔✔E. All of the above - ✔✔120. Which lab test(s) would be performed to evaluate for
the presence of a neural tube defect or Down syndrome?
A. Quad screen
B. MSAFP
C. CVS
D. Amniocentesis
E. All of the above
✔✔C. Umbilical arteries - ✔✔121. In this color Doppler image is demonstrated in which
vessels? (See Color obtained at the level of the abdominal cord insertion, b lood flow
Plate 1 on page xvi.)
A. Hepatic veins
B. Ductus venosus
C. Umbilical arteries
D. Uterine arteries
E. Umbilical veins
✔✔D. Choroid plexus - ✔✔122. What is the arrow pointing to in this transverse image of
the fetal head?
A. Thalami
B. Third ventricle
C. Cisterna magna
D. Choroid plexus
E. Cerebellum
✔✔D. Vasa previa - ✔✔123. While scanning an obstetric patient, you obtain a midline
sagittal view of the lower uterin segment. if the cord is between the presenting part and
the internal os, this is caled:
A. Complete previa
B. Partial previa
C. Cord presentation
D. Vasa previa
E. B and D
,✔✔A. Female - ✔✔124. The gender of this fetus is:
A. Female
B. Male
C. XY
D. Ambiguous
E. B and C
✔✔C. M-mode - ✔✔125. What ultrasound modality would you use to prove fetal life on
a frozen image?
A. A-mode
B. B-mode
C. M-mode
D. 3D E. Static scanning
✔✔E. All of the above may be used to perform a simultaneous assessment of atrial and
ventricular contraction. - ✔✔126. If fetal heart rate is documented to be bradycardic,
tachycardic, or irregular, what mode should be employed to evaluate atrial and
ventricular contractions?
A. M-mode sonography of the atrium and ventricle
B. Doppler sonography of the atrium and ventricle
C. Doppler sonography of the mitral inflow-aortic outflow
D. Doppler sonography of the superior vena cava-ascending aorta
E. All of the above may be used to perform a simultaneous assessment of atrial and
ventricular contraction.
✔✔D. Choroid plexus - ✔✔127. Which structure is being measured by the calipers in
this image?
A. Cisterna magna
B. Third ventricle
C. Circle of Willis
D. Choroid plexus
E. Brain stem
✔✔D. Square root of (BPD x OFD)/1.265 - ✔✔128. What is the formula for determining
the corrected BPD?
A. 1.62 x (BPD + OFD)
B. BPD/OFD x 100
C. F, F
D. Square root of (BPD x OFD)/1.265
E. 1.57 X (anteroposterior AD + transverse AD)
✔✔D. A and B - ✔✔129. The placenta develops from the:
A. Chorion
B. Decidua
C. Amniorn
, D. A and B
E. B and C
✔✔C. Decidua basalis - ✔✔130. The maternal side of the developing placenta is
referred to as the:
A. Decidua parietalis
B. Decidua chorion
C. Decidua basalis
D. Decidua capsularis
E. Decidua vera
✔✔B. Cord insertion - ✔✔131. Together these two images demonstrate: (See Color
Plate 2 on page x viii)
A. Three-vessel cord
B. Cord insertion
C. Gastroschisis
D. Skin edema
E. Omphalocele
✔✔E. Succenturiate - ✔✔132. What term refers to an accessory placental lobe?
A. Battledore
B. Circumvallate
C. Abruption
D. Membranacea
E. Succenturiate
✔✔B. Bipartite placenta - ✔✔133. A placenta that has two equally sized lobes
connected by vessels is called a
A. Membranous placenta
B. Bipartite placenta
C. Circumvallate placenta
D. Lobar placenta
E. Succenturiate placenta
✔✔A. Placental abruption - ✔✔134. A patient presents with severe abdominal pain and
vaginal bleeding. This sonogram demonstrates:
A. Placental abruption
B. Marginal placenta
C. Circumvallate placenta
D. Normal placenta
E. Placenta previa
✔✔E. Placental abruption - ✔✔135. This image is from a 30-year-old patient who was a
victim of physical domestic violence. She reported to the emergency room with
cramping in her lower abdomen. Based on the clinical history and image provided, what
diagnosis is most likely?
SURE A+
✔✔A. Amniocentesis - ✔✔116. Which of the following procedures can rule out Down
syndrome in at-risk patients?
A. Amniocentesis
B. Biophysical profile
C. Quad screen
D. Ultrasound
E. Vesicocentesis
✔✔E.37 - ✔✔117. Physicians usually do not start to consider a cesarean section due to
placenta previa untl week
A. 21
B. 25
C. 30
D. 32
E. 37
✔✔E. 33-35 weeks' gestation - ✔✔118. The distal femoral epiphysis is demonstrable
sonographically at:
A. 14-16 weeks' gestation
B. 18-20 weeks' gestation
,C. 22-24 weeks' gestation
D. 28-30 weeks' gestation
E. 33-35 weeks' gestation
✔✔D. A and B - ✔✔119. A volume scan of the fetal heart acquired in the four-chamber
plane will allow you also to demonstrate
A. Outflow tracts
B. Aortic and ductal arches
C. Inferior vena cava
D. A and B
E. None of the above
✔✔E. All of the above - ✔✔120. Which lab test(s) would be performed to evaluate for
the presence of a neural tube defect or Down syndrome?
A. Quad screen
B. MSAFP
C. CVS
D. Amniocentesis
E. All of the above
✔✔C. Umbilical arteries - ✔✔121. In this color Doppler image is demonstrated in which
vessels? (See Color obtained at the level of the abdominal cord insertion, b lood flow
Plate 1 on page xvi.)
A. Hepatic veins
B. Ductus venosus
C. Umbilical arteries
D. Uterine arteries
E. Umbilical veins
✔✔D. Choroid plexus - ✔✔122. What is the arrow pointing to in this transverse image of
the fetal head?
A. Thalami
B. Third ventricle
C. Cisterna magna
D. Choroid plexus
E. Cerebellum
✔✔D. Vasa previa - ✔✔123. While scanning an obstetric patient, you obtain a midline
sagittal view of the lower uterin segment. if the cord is between the presenting part and
the internal os, this is caled:
A. Complete previa
B. Partial previa
C. Cord presentation
D. Vasa previa
E. B and D
,✔✔A. Female - ✔✔124. The gender of this fetus is:
A. Female
B. Male
C. XY
D. Ambiguous
E. B and C
✔✔C. M-mode - ✔✔125. What ultrasound modality would you use to prove fetal life on
a frozen image?
A. A-mode
B. B-mode
C. M-mode
D. 3D E. Static scanning
✔✔E. All of the above may be used to perform a simultaneous assessment of atrial and
ventricular contraction. - ✔✔126. If fetal heart rate is documented to be bradycardic,
tachycardic, or irregular, what mode should be employed to evaluate atrial and
ventricular contractions?
A. M-mode sonography of the atrium and ventricle
B. Doppler sonography of the atrium and ventricle
C. Doppler sonography of the mitral inflow-aortic outflow
D. Doppler sonography of the superior vena cava-ascending aorta
E. All of the above may be used to perform a simultaneous assessment of atrial and
ventricular contraction.
✔✔D. Choroid plexus - ✔✔127. Which structure is being measured by the calipers in
this image?
A. Cisterna magna
B. Third ventricle
C. Circle of Willis
D. Choroid plexus
E. Brain stem
✔✔D. Square root of (BPD x OFD)/1.265 - ✔✔128. What is the formula for determining
the corrected BPD?
A. 1.62 x (BPD + OFD)
B. BPD/OFD x 100
C. F, F
D. Square root of (BPD x OFD)/1.265
E. 1.57 X (anteroposterior AD + transverse AD)
✔✔D. A and B - ✔✔129. The placenta develops from the:
A. Chorion
B. Decidua
C. Amniorn
, D. A and B
E. B and C
✔✔C. Decidua basalis - ✔✔130. The maternal side of the developing placenta is
referred to as the:
A. Decidua parietalis
B. Decidua chorion
C. Decidua basalis
D. Decidua capsularis
E. Decidua vera
✔✔B. Cord insertion - ✔✔131. Together these two images demonstrate: (See Color
Plate 2 on page x viii)
A. Three-vessel cord
B. Cord insertion
C. Gastroschisis
D. Skin edema
E. Omphalocele
✔✔E. Succenturiate - ✔✔132. What term refers to an accessory placental lobe?
A. Battledore
B. Circumvallate
C. Abruption
D. Membranacea
E. Succenturiate
✔✔B. Bipartite placenta - ✔✔133. A placenta that has two equally sized lobes
connected by vessels is called a
A. Membranous placenta
B. Bipartite placenta
C. Circumvallate placenta
D. Lobar placenta
E. Succenturiate placenta
✔✔A. Placental abruption - ✔✔134. A patient presents with severe abdominal pain and
vaginal bleeding. This sonogram demonstrates:
A. Placental abruption
B. Marginal placenta
C. Circumvallate placenta
D. Normal placenta
E. Placenta previa
✔✔E. Placental abruption - ✔✔135. This image is from a 30-year-old patient who was a
victim of physical domestic violence. She reported to the emergency room with
cramping in her lower abdomen. Based on the clinical history and image provided, what
diagnosis is most likely?
