Decidua

decidua basalisdecidualdecidua capsularisdeciduumNitabuch's layeruterine decidua
The decidua is the modified mucosal lining of the uterus (that is, modified endometrium) that forms in preparation for pregnancy.wikipedia
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Placenta

placental barrierchorioallantoic placentaafterbirth
The decidua forms the maternal part of the placenta and remains for the duration of the pregnancy.
The placenta functions as a fetomaternal organ with two components: the fetal placenta (Chorion frondosum), which develops from the same blastocyst that forms the fetus, and the maternal placenta (Decidua basalis), which develops from the maternal uterine tissue.

Uterus

wombuterineuteri
The decidua is the modified mucosal lining of the uterus (that is, modified endometrium) that forms in preparation for pregnancy.
During pregnancy, the uterine glands and blood vessels in the endometrium further increase in size and number and form the decidua.

Deciduous

deciduous forestdeciduous treedeciduous forests
It is shed off during childbirth — hence why the term is used, "decidua" having the meaning of falling away, as in the word deciduous.
"Deciduous" has a similar meaning when referring to animal parts, such as deciduous antlers in deer, deciduous teeth (baby teeth) in some mammals (including humans); or decidua, the uterine lining that sheds off after birth.

Placenta accreta

Placenta percretaPlacenta incretableed to death during the birth of her baby
In invasive placental disorders like placenta accreta decidualization have been consistently found to be deficient.
A thin decidua can also be a contributing factor to such trophoblastic invasion.

Endometrium

endometrialuterine lininglining of the uterus
The decidua is the modified mucosal lining of the uterus (that is, modified endometrium) that forms in preparation for pregnancy.
Instead, it remains as decidua.

Implantation (human embryo)

implantationimplantimplants
In animals exhibiting hemochorial placentation, the endometrium undergoes decidualization following implantation.
However, the decidual cells make up a new layer, the decidua.

Trophoblast

trophectodermtrophoblaststrophoblastic
The part of the decidua that interacts with the trophoblast is the decidua basalis (also called decidua placentalis), while the decidua capsularis grows over the embryo on the lumenal side, enclosing it into the endometrium.
Trophoblasts are specialized cells of the placenta that play an important role in embryo implantation and interaction with the decidualised maternal uterus.

Relaxin

relaxin-like peptide
Among its products are hormones commonly associated with other organs such as cortisol, CRF, GnRH, prolactin, and relaxin.
In the female, it is produced by the corpus luteum of the ovary, the breast and, during pregnancy, also by the placenta, chorion, and decidua.

Prolactin

PRLlactationprolactin secretion
Among its products are hormones commonly associated with other organs such as cortisol, CRF, GnRH, prolactin, and relaxin.
In humans, prolactin is produced at least in the anterior pituitary, decidua, myometrium, breast, lymphocytes, leukocytes and prostate.

Decidualization

endometrial transformationdecidual reactiondecidualisation
In animals exhibiting hemochorial placentation, the endometrium undergoes decidualization following implantation. It is formed in a process called decidualization under the influence of progesterone. Decidualization includes the process of differentiation of the spindle-shape stromal fibroblasts into the plump secretory decidual cells, which create a pericellular extracellular matrix rich in fibronectin and laminin (similar to epithelial cells).
The sum of these changes results in the endometrium changing into a structure called the decidua.

PAEP

glycodelin
Insulin-like growth factor-binding protein 1 (IGFBP1) also called placental protein 12, and PAEP (glycodelin) appear to be specific products of the secretory and decidual lining.
It is encoded by a 1-kilobase-pair mRNA that is expressed in human secretory endometrium and decidua but not in postmenopausal endometrium, placenta, liver, kidney, and adrenals.

Chronic deciduitis

A long-lasting infection of the decidua, chronic deciduitis, is associated with pre-term labour.
Chronic deciduitis is a type of long-lasting inflammation that arises in pregnancy and affects the endometrial stromal tissue (decidua).

Mucous membrane

mucosamucous membranesmucosal
The decidua is the modified mucosal lining of the uterus (that is, modified endometrium) that forms in preparation for pregnancy.

Pregnancy

pregnantfirst trimesterpregnant women
The decidua is the modified mucosal lining of the uterus (that is, modified endometrium) that forms in preparation for pregnancy.

Progesterone

EndometrinprogestationalProgesterone for prevention of preterm birth
It is formed in a process called decidualization under the influence of progesterone.

Childbirth

laborbirthlabour
It is shed off during childbirth — hence why the term is used, "decidua" having the meaning of falling away, as in the word deciduous.

Embryo

embryosembryonalhuman embryos
The part of the decidua that interacts with the trophoblast is the decidua basalis (also called decidua placentalis), while the decidua capsularis grows over the embryo on the lumenal side, enclosing it into the endometrium.

Fibronectin

FN1fibronectins
Decidualization includes the process of differentiation of the spindle-shape stromal fibroblasts into the plump secretory decidual cells, which create a pericellular extracellular matrix rich in fibronectin and laminin (similar to epithelial cells).

Laminin

lamininsLaminin 5laminin-1
Decidualization includes the process of differentiation of the spindle-shape stromal fibroblasts into the plump secretory decidual cells, which create a pericellular extracellular matrix rich in fibronectin and laminin (similar to epithelial cells).

White blood cell

leukocyteleukocyteswhite blood cells
Its leukocyte population is distinct, with the presence of large endometrial granular leukocytes being predominant, while polynuclear leukocytes and B cell s are scant.

B cell

B cellsB-cellB lymphocytes
Its leukocyte population is distinct, with the presence of large endometrial granular leukocytes being predominant, while polynuclear leukocytes and B cell s are scant.

Neural cell adhesion molecule

CD56NCAMNCAM1
The large granular lymphocytes (CD56 bright) are called "uterine natural killer cells" or "uNK cells" in mice, and "decidual NK cells" or "dNK cells" in humans.

Uterine natural killer cells

uterine NK cells
The large granular lymphocytes (CD56 bright) are called "uterine natural killer cells" or "uNK cells" in mice, and "decidual NK cells" or "dNK cells" in humans.