Chapter 55: The Placenta

Helpfulness: 0
Set Details Share
created 6 years ago by Annabelle
603 views
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:
1

abruptio placenta

premature detachment of the placenta from the uterine wall

2

basal plate

the maternal surface of the placenta that lies contiguous with the deciduas basalis

3

battledore placenta

cord insertion into the margin of the placenta

4

Braxton-Hicks contractions

spontaneous painless uterine contractions described originally as a sign of pregnancy; they occur from the first trimester to the end of pregnancy

5

chorion frondosum

the portion of the chorion that develops into the fetal portion of the placenta

6

chorionic plate

part of the chorionic membrane that covers the placenta

7

chorionic villi

microscopic vascular projections from the chorion that combine with the maternal uterine tissue to form the placenta

8

circummarginate placenta

a placental condition in which the chorionic plate of the placenta is smaller than the basal plate, with a flat interface between the fetal membranes and the placenta

9

circumvallate placenta

a placental condition in which the chorionic plate of the placenta is smaller than the basal plate; the margin is raised with a rolled edge

10

decidua basalis

the part of the decidua that unites with the chorion to form the placenta

11

decidua capsularis

the part of the decidua that surrounds the chorionic sac

12

ductus venosus

connection that is patent during fetal life from the left portal vein to the systemic veins (inferior vena cava)

13

ligamentum venosum

fibrous remains of the ductus venosus from fetal circulation

14

lower uterine segment (LUS)

lower part of the uterine cavity, which expands during pregnancy and joins with the cervical canal

15

molar pregnancy

also known as gestational trophoblastic disease; abnormal proliferation of trophoblastic cells in the first trimester

16

placenta accreta

growth of the chorionic villi superficially to the myometrium; it does not penetrate through the myometrium

17

placenta increta

growth of the chorionic villi deep into the myometrium

18

placenta percreta

growth of the chorionic villi through the myometrium to the uterine serosa

19

placenta previa

placenta grows in the lower uterine segment and covers all or part of the cervix

20

placental migration

placenta is attached to the uterine wall; as the uterus enlarges, the placenta “moves” with it; therefore, a low-lying placenta may move out of the lower uterine segment in the second trimester

21

succenturiate placenta

one or more accessory lobes connected to the body of the placenta by blood vessels

22

vasa previa

occurs when the intramembranous vessels course across the internal cervical os

23

velamentous placenta

cord insertion at the membranes

24

Wharton’s jelly

mucoid connective tissue that surrounds the vessels within the umbilical cord