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OB 1 > midterm > Flashcards

midterm Flashcards

1
Q

A ___________ transducer may provide optimal images well into the third trimester on a thin patient.

A

5.0 MHz

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2
Q

A correctly filled bladder allows for imaging of the ________________ and lower placental edge.

A

Cervix

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3
Q

A fetus positioned wit the cranium in the superior uterus, rump in the inferior uterus, and spine at the maternal right uterus is labeled:

A

breech, left lateral

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4
Q

A normal gestation last approximately:

A

280 days

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5
Q

A sonogram at 8 weeks of gestation demonstrates a cystic area within the posterior cranium. This appearance most likely represents which one of the following?

A

Normal rhombencephalon

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6
Q

At what age have the rudimentary forms of all embryonic organs and structures developed?

A

Almost 11 weeks menstrual/GA

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7
Q

Choose the position that is the same as a cephalic presentation.

A

vertex

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8
Q

Endovaginal transducers aid the clinician in determing all except:

A

fluid in Morison pouch

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9
Q

Identify the blastocyst layer that eventually develops into the embyryonic portion of the placenta.

A

Trophoblast

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10
Q

In early pregnancy, the gestational sac size grows at a rate of ___________ mm/day.

A

1-2

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11
Q

In the breech fetus with the transverse spine and orientation marker to the right of the monitor, the fetus is lying __

A

on it’s right side

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12
Q

in the first trimester, herniated bowel will return within the abdominal cavity by the ____________ week

A

12th

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13
Q

Name the solid ball of developing cells that occurs after fertilization.

A

morula

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14
Q

Select the normal chromosome number for an ovum

A

22X or 22Y

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15
Q

The blastocyst typically enters the uterus ___________ days after fertilization.

A

6 to 8

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16
Q

The crown-rump length measurement is considered most accurate through the _________ gestational week.

A

Twelfth

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17
Q

The diameter of the normal yolk sac should never exceed____________ mm.

A

6mm

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18
Q

The embryonic heart begins to beat at _________ days after conception.

A

23

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19
Q

The inability of some females to lay supine during weeks 20 - term pregnancy because of a hypotensive state is known as:

A

aortocaval compression syndrome

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20
Q

The interface between the decidua capsularis and echogenic vascular endometrium is which one of the following?

A

Double decidual sign

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21
Q

The portion of the endometrium that surrounds the blastocyst is:

A

decidua capsularis

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22
Q

The villi on the myometrial side of the conceptus are known as which one of the following?

A

Decidua basalis

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23
Q

To calculate the mean sac diameter of a gestational sac, which one of the following formulas should be used?

A

Length x Width x Height) / 3

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24
Q

Ultrasound in the first trimester is mostly performed to demonstrate:

A

EDD, GA, and likelihood of continuing to term

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25
Q

Using Naegele’s rule, what would be the estimated due date for a woman with a LMP of September 10th ?

A

June 17th

26
Q

Using a transvaginal approach, the first structure visualized within a gestational sac is which one of the following structures?

A

Secondary yolk sac

27
Q

What is the area between the myometrium and the placenta?

A

Retroplacental

28
Q

What is the formula to calculate gestational age in weeks?

A

Menstrual age in days/7

29
Q

What portion of the fallopian tube does fertilization generally occur in ?

A

ampullary

30
Q

What prevents more than one sperm from entering an ovum?

A

Zona pellucida

31
Q

What structure images after the secondary yolk sac?

A

Embryo

32
Q

What would be the correct formula to calculate gestational age in days?

A

MSD + 30

33
Q

What would be the gestational age of an embryo with a CRL of 0.38 cm?

A

6.3 weeks

34
Q

When the fetus is vertex and the transverse spine is on the left side of the monitor, the fetus is lying__

A

on it’s right side

35
Q

Where does implantation of the embryo occur?

A

endometrium

36
Q

Which hormone triggers ovulation?

A

LH

37
Q

Which of the following contributes to the maternal portion of the placenta?

A

basal decidua

38
Q

Which of the following laboratory tests is used to indicate pregnancy when the values are elevated?

A

hcg

39
Q

Which one of the following structures forms early in gestation and surrounds the embryo?

A

amniotic cavity

40
Q

or “footling” breech indicates the fetus has one foot or both feet down (towards the cervix), so it’s legs are poised to deliver first.

A

incomplete

41
Q

__ breech refers to when the buttocks present first (toward the cervix) and both hips and knees are flexed.

A

complete

42
Q

___refers to when the head is down towards the cervix.

A

vertex

43
Q

Select the procedure used to obtain a fetal blood sample.

A

pubs

44
Q

Which procedure allows for sampling of the amniotic fluid?

A

amniocentesis

45
Q

Which of the following can be done in the first six weeks of gestation?

A

coelocentesis

46
Q

Which of the following is the most common maternal disorder?

A

diabetes mellitus

47
Q

All of the following are recognized as part of the double decidual sac sign except:

A
48
Q

A cresent shaped sonolucent collection of blood between the gestational sac and the uterine wall is ___

A

subchorionic hemorrhage

49
Q

A deficiency of red blood cells is __

A

anemia

50
Q

A gestational sac in which the embryo fails to develop is described as which one of the following?

A

anembryotic pregnancy

51
Q

Which one of the following is the most common pelvic mass seen in a first-trimester pregnancy?

A

corpus luteum cyst

52
Q

Which location of ectopic pregnancy would have an increased risk of massive hemorrhage?

A

abdomen

53
Q

Theca Lutein cysts are usually stimulated by excessive levels of hCG and are related to:

A
54
Q

The term for having an abnormal number of chromosomes is _____

A

Aneuploidy

55
Q

The term for an abnormally rapid heart rate is __

A

tachycardia

56
Q

The spontaneous failure and expulsion of an early pregnancy is _

A

abortion

57
Q

The serum level of beta hCG is __________________ with gestational trophoblastic disease.

A
57
Q

the most common cause of vaginal bleeding in the first trimester is which one of the following

A

spontaneous abortion

58
Q

Ectopic pregnancy most often implant in the:

A

fallopian tube (ampullary)

59
Q

Early onset intrauterine growth restriction is defined as crown rump length at least ______________ standard deviations below the mean for the expected gestational age.

A

two

OB 1 (8 decks)

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