Placenta Flashcards
Ovulation and __ occur day ___ of menstrual cycle
____ following fert, the developing ___ attaches to the ___ in the uterine cavity
Incomplete transit through the ___ may lead to ___
Blastocyst burrows into endometrium until ____ is buried and no longer w in
fert, 14
6 days, blastocyst, secretory epithelium
FT, ectopic pregnancy
conceptus, endometrial cavity proper
Trophoblastic cells of blastocyst differentiate into ___ and ___
___ makes contact w uterine lining
Troph develops ___ composed of __ and __ layers
Villli invades ___ and ___
__ and ___ differentiate from ___
first US cnfirmtation of ___ is a small ___ deep to he endometrial stripe
cytotrophoblast, synctiotrophoblst
synctiotrophoblast
villi, cyto/synctiotrophoblast
endometrium and maternal bv
yolk sac/amnion
intrauterine preg, lucency
villi normally surround __ but regress in ___ nearest the ___
___ facing away from endometrial surface becomes ___
___ of growing embryo expands into _ such that the enlarging amnion comes to surround the ___ and ___
as it fills the chorionic cavity, the ___ fuses w the ___ to form the ___ (membrnaes)
entire chorion, smooth chorion
villous chorion, placenta
dorsal surface, amniotic cavity, fetus/body stalk
amnion, chorion, chorioamnion
Yolk sac is originally __ nad becomes __
pedicle becomes __ during devel
dorsal part of yolk sac is taken to help form ___
allantois projects from ___ into the base of __ which lengthens and comes to be surrounded by ___
disorders of this underlie __ and __ malformations
prominent, smaller
longer
gut
yolk sac, body stalk, expanding amnion
gut, ab wall
As amnion covers the ___ and ___, resulting structure is the ___
cord contains ___ each arising from fetal____ and one vein returning blood through the liver to the __
vessels surrounded and protected by ___ known as
Development of ___ and ___ is visible on vaginal probe US bw ___ and ___ until around ___
at this time, choroamnion is ___ and placenta appears as ____ mass
placental disc/elongating body stalk, umbilical cord
2 arteries, internal iliac arties, lVC
special CT, whartons Jelly
placenta, membranes, 4/5, 9/10 wks
fused, cake like
Synctiotrophoblast makes __ and ___ and ___
HCG supports __ of ovarian ___ fxn and its secretion of __
as CL gradually deteriorates over the 1st trimester, ___ inc to replace endocrine fxn of ___ to support pregnancy
maternal BV spurts into ___ bathing villi and bearing ____, ___ and __
HCG and HPL, steroid hormones
prolongation, CL, progesterone
placental progesterone, CL
intervillous space, fetal arterioles/capillaries/venules
___ support enlarging arborizing pattern
___ tether ___ to decidua
secondary/tertiary terminal villi arise as ___ and acquire ___ and ___
third trimester terminal villi capillaries inc in __ and __
__ location in villi diminshes ___ bw __ and __ circulation
stem villi
anchoring villi, cotyledons
larger braches, mesenchymal core/BV
number/size
peripheral location, distance, fetal/maternal
Extravillous/ ____ troph
following initial erosion of ___ by synctiotrophoblast, scattered troph cells invade among paler _____
some of these ___ cells establish contact w _____ and __ maternal arteries, replacing maternal aterial wall w ____
___ changes decidual arteries to ___ vessels
lumens ___ have dec ___ to keep fetal intravillous vessels open and flowing
Derangements in this process underlie ___ and __
intermediate
endometrium, maternal decidual cells
troph, maternal endometrial vessels, remodel, fetal troph cells
physiologic conversion, uteroplacental vessels
widen, flow resistance
preeclampsia, fetal growth restriction
Fetal surface of placenta
___ cross over ___
maternal surface of placenta
inspect placenta at delivery for ____
adherent ___ may be left behind
tissue processors remove ___ and ___ from tissue secretions via a series of steps involving ___ and ___
replaces tissue fluid w ___
arteries, veins
completeness
cotyledons
water, formalin, alcohol/xylene
paraffin
