chapter 56

Question 1

what are the 3 decidual ?

Answer 1

1. decidua basalis
2. decidual capsularis
3. decidual vera

Question 2

chorion frondosum :

Answer 2

forms fetal part of placenta: contains villi

Question 3

chorion laeve:

Answer 3

nonvillios part of chorion around gestational sac.

Question 4

chorionic plate:

Answer 4

fetal surface of placenta

Question 5

basal plate:

Answer 5

maternal surface of placenta

Question 6

fetal placenta cells come from

Answer 6

cytotrophoblastic shell and anchoring villi.

Question 7

approximately 40 % of fetal cardiac out put is directed through ____?

Answer 7

umbilical circulation

Question 8

infraction is?

Answer 8

obstruction of blood flow.

Question 9

placenta membranes is called ____?

Answer 9

barrier

Question 10

battledore?

Answer 10

abnormal cordal attachments to placenta: edge of placenta.

Question 11

when does the secondary yolk sac form ?

Answer 11

after the regression of primary yolk sac.

Question 12

by 9 weeks yolk sac should be ___ mm

Answer 12

5 mm

Question 13

what is the most common implantation of the placenta?

Answer 13

fundal posterior

Question 14

amnion fuses with chorion by which week?

Answer 14

16th week

Question 15

in 1st trimenster the fetus begins to ___?

Answer 15

excrete urine to fill amniotic cavity

Question 16

amniotic fluid functions are:

Answer 16

permitting fetus room to move
allowing lungs to develop properly
serving as protective buffer for fetus
maintaining constant fetal body temp.

Question 17

the umbilical cord is formed during 1st ___ weeks of gestation.

Answer 17

5 weeks

Question 18

what is the percentage that the fetus has a single umbilical cord abnormality ?

Answer 18

25 to 50 %

Question 19

the second surface is ____, the maternal portion of the placenta.

Answer 19

basal plate

Question 20

Normal placenta should not exceed?

Answer 20

4 cm

Question 21

placenta is separate from ____?

Answer 21

myometrium

Question 22

If the bladder is full, what impression can it present?

Answer 22

impression of previa- falsely elongated

Question 23

what is the best way to identify lower uterine segment,

Answer 23

transvaginal

Question 24

high resistance flow is seen when there is ?

Answer 24

stenosis

Question 25

normal flow pattern is ?

Answer 25

low-resistance

Question 26

normal characteristic of placenta are?

Answer 26

measure 15 to 20 cm
weighs about 600 g
measures < 4 cm in thickness
discoid shape

Question 27

placenta accreta

Answer 27

chorionic villi attach to myometrium without muscular invasion.

Question 28

placenta abruption- dissecting

Answer 28

trickling down / showing of detachment. On the side

Question 29

placental abruption- concealed:

Answer 29

not showing with severe pain. On the top

Question 30

what happends with placental infacts

Answer 30

calcification may occur over time

Question 31

gestational trophoblast disease

Answer 31

23 chromosons or 25
possible more fetuses or none.
mole tumor takes nutrients. grows rapidly.

Question 32

placenta abruption refers to?

Answer 32

separation of normally implanted placenta prior to term delivery

Question 33

Name the layers of endometrium.

Answer 33

Zona basalis and zona functionalis

Question 34

What is succenturiate placenta?

Answer 34

If the placenta does not communicate with an anterior/posterior then it will be considered an accessory lobe placenta. Additional lobes joined to the main placenta.

Question 35

What is battledores placenta?

Answer 35

The umbilical cord is inserted at or near the placental margin rather than in the center. Less than 2 cm of the edge.

Question 36

What is velamentous placenta?

Answer 36

Is one of the two most common causes of vasa previa. Insertion of the umbilical cord into placental membranes, which cross over the cervix.