Chapter 18: Review Question Flashcards
A sonographer can minimize thermal effects by which one of the following?
a. not staying in one spot too long
b. places the focus of the beam in the near field
c. scanning over fetal bone
d. increasing acoustic output
a
A sonogram at 8 weeks gestatioin demonstrates a cystic area within the posterior cranium.
Normal rhombencephalon
In early pregnancy, the gestational sac grows at a rate of ___ mm/day.
1-2
In the first trimester, herniated bowel will return within the abdominal cavity by the ____ week.
12th
The blastocyst typically enters the uterus ____ days after fertilization.
6 days
The crown-rump length measurement is considered most accurate through the ____ gestational week.
twelfth
The diameter of the normal yolk sac should never exceed ___ mm.
6 mm
The embryonic heart begins to beat at ____ days after conception.
23
The interface between the decidua capsularis and echogenic vascular endometrium is which of the following?
a. decidua capsularis
b. decidua basalis
c. double decidual sign
d. chorionic cavity
The villi on the myometrial side of the conceptus are known as which one of the following?
a. double decidual sign
b. decidua basalis
c. decidua capsularis
d. chorion laeve
Decidua basalis
To calculate the mean sac diameter of a gestational sac, which one of the following formulas would be used?
a. length x width x height
b. length + width + height
c. (length x width x height) / 3
d. (length + width + height) / 3
D
Select the normal chromosome for an ovum
a. 46 XXY
b. 46 XY or 46 XX
c. 23 CO
d. 22X or 22Y
Using a transvaginal approach, the first structure visualized within a gestational sac is which one of the following?
Secondary yolk sac
What is the area between the myometrium and the placenta?
Retroplacental zone
Which of the following laboratory tests is used to indicate pregnancy when the values are elevated?
a. FSH
b. LH
c. hCG
d. HL
c
Which one of the following structures forms early in gestation and surrounds the embryo?
a. chorionic cavity
b. chorion frondosum
c. amniotic cavity
d. fetal cavity
C
Where does implantation of the embryo occur?
Uterus
A normal gestation lasts approximately:
280 days
Which hormone triggers ovulation?
LH
What portion of the fallopian tube does fertilization generally occur in?
ampullary
Name the solid call of developing cells that occurs after fertilization
morula
Identify the blastocyst layer that eventually develops into the embryonic portion of the placenta
Trophoblast
Which structures images after the secondary yolk sac?
a. zygote
b. primary yolk sac
c. exocoelomic cavity
d. embryo
D
Select the gestational age when the yolk sac images between the chorion and amnion.
a. carnegie stage 11
b. 11 weeks
c. canegie stage 20
d. 5 weeks
C
