verified detailed answers || ||
The normal gestational sac grows at the approx rate of? - correct answer✔✔1 mm per day
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In late gestation, the hyperechoic contents of the fetal colon typically represent? - correct
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answer✔✔meconium
Percutaneous umbilical blood sampling (pubs) is performed under ultrasound guidance for
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which of the following reasons:
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A. To transfuse a severely anemic fetus
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B. To provide nutrition for a severely iugr fetus
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C. In cases where determination of fetal-maternal blood incompatibility is necessary
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D. More than one above
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E. None of the above - correct answer✔✔d. More than one above
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A and c
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A specific clinical indication of premature rupture of membranes is? - correct
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answer✔✔passage of a large amount of watery fluid || || || || || || ||
The corpus luteum cyst of pregnancy is maintained through out the 1st trimester by what
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process? - correct answer✔✔production of hcg by the trophoblastic cells
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A crl lenght measurement of 16mm corresponds to what gestational age? - correct
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answer✔✔7.9 and 58 days || || ||
16mm +42 = 58 days || || || ||
,Crl rule of thumb - correct answer✔✔crl (mm) + 42 = gestational age (days)
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A thin, echogenic circular structure is seen surrounding the embryo, separate from the
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secondary yolk sac. What does this represent? - correct answer✔✔amniotic membrane
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A patient presents with cramping and heavy vaginal bleeding that has persisted for over 3
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days. What is the most likely explanation? - correct answer✔✔incomplete spontaneous
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abortion.
Twin-twin transfusion syndrome is a serious complication for a twin gestation. Which of
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the following is not true about this condition:
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A. It occurs only with monozygotic twinning
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B. The donor twin may be "stuck" in an oligohydramanitoic sac, while the recipient twin
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may exhibit signs of hydrops
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C. There is a vascular anastomosis in the shared placenta that shunts blood away from one
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fetus to the other || || ||
D. Both fetuses grow concordantly through out the course of gestation - correct answer✔✔d
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Which of the following is not a sonographic indicator for an ectopic pregnancy
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implantation?
A. Slow rising serum hcg
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B. Free fluid in the posterior cul-de-sac
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C. Complex adrenal mass adjacent to the ovary
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D. Poorly decidualized endometrium - correct answer✔✔a
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With endovaginal scanning, a small soft tissue mass is seen anterior to the abdominal wall
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of an 11 week old embryo, at the location of the umbilical cord insertion. What is the
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,probable explanation for this finding? - correct answer✔✔normal herniated bowel in the
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umbilical cord ||
Normal bowel herniation occurs and ends between - correct answer✔✔8-12weeks gestation
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An autosomal recessive disorder of the fetal kidneys that affects the kidneys bilaterally and
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makes them appear echogenic is? - correct answer✔✔polycystic kidney disease
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All of the following are associated with a decreased hcg level except:
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A. Partial mole
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B. Embryonic demise
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C. Incorrect dates
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D. Missed abortion - correct answer✔✔a.
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What is a typical dopppler waveform pattern for trophoblastic flow?
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A. High velocity, high resistance
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B. Low velocity, high resistance
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C. High velocity, low resistance
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D low velocity, low resisatnce - correct answer✔✔c
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The "banana" and "lemon" signs are associated findings of: - correct answer✔✔spina bifida
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The three ossification centers of the spine are seen best in a ____________ plane of section.
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- correct answer✔✔transverse
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A msd is used to estimate gestational age under which of the following circumstances?
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A. When a accurate crl cannot be measured
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, B. Prior to visualization of the intracranial landmarks for bpd
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C. If the sonographic findings suggest an anembryonic pregnancy
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D. More than one of the above - correct answer✔✔a
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The highest oxygenated blood is found in what fetal heart chamber? - correct
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answer✔✔right atrium ||
The cisterna magna appears sonographically as an - correct answer✔✔anechoic space
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inferior to the cerebellum || || ||
The foramen ovale helps direct blood from the right atrium to the: - correct answer✔✔left
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atruim
Some of the fetal blood that passes into the liver via the umbilical vein goes directly into the
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ductus venosum. The rest passes into the : - correct answer✔✔portal venous system
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If a fetus is in transverse lie, head to the maternal left, facing maternal anterior, a
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longitudinal view of the uterus shows - correct answer✔✔fetal abdomen cross section
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Fetal stomach towards lus || || ||
Fetal spine towards maternal spine
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A maternal serum markers that can indicate fetal abnormalities - correct
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answer✔✔unconjugated estriol ||
A rounded, complex mass is identified that appears to be associated with the placenta.
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Which of the following is least likely?
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A. Myoma
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B. Subchorionic hematoma
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