In the first six or eight weeks the whole ovum is usually born developed in decidual tissue; sometimes the ovum will slip out of the decidua and be covered only with shaggy villi, suggestive of a chestnut burr.
Endometritis at the decidua may cause hydrorrhoea gravidarum, and the accumulated serous secretions from this source are likely to start uterine contraction.
The contracting uterus in abortion expels the decidua with considerable difficulty, but the ovum containing the fetus may slip out easily and be lost.
The chorion frondosum, together with the decidua serotina, gives rise to the placenta.
The decidua vera is mainly characterised by the presence of peculiar roundish cells in its subepithelial tissue, and by the disappearance of a distinct lining of epithelial cells.
The blastodermic vesicle of the Guinea-pig becomes completely enveloped in a capsule of the uterine wall (decidua reflexa) (fig.
The general cavity of the uterus is to a large extent obliterated by the ovum, but still persists as a space filled with mucus, between the decidua reflexa and the decidua vera.
He finds however in the placenta various parts which he regards as homologous with the decidua vera and reflexa of Mammalia.
Folds of this nature, which are specially developed in Man and Apes, are known as a decidua reflexa.
Its tissue undergoes changes in the main similar to those of the decidua vera, and as has been already mentioned, it fuses on the one hand with the chorion, and on the other with the decidua vera.
At its edge it is continuous both with the decidua reflexa and decidua vera.
The decidua reflexa, on the disappearance of the vessels in the chorion laeve, becomes non-vascular.
During this stage the preparing of a decidua takes place, or building a nest for the expected egg; there is a swelling of the mucous membrane, an enlargement of the uterine glands, and an increase in the connective tissue.
It has been thought that the decidua of a particular menstrual period is related, not to the ovum discharged at that period, but to the ovum discharged at the preceding period.
A portion of deciduaseparated from its inner surface.
It is loosely connected with the chorion on its external surface, except when this membrane unites with the decidua to form the placenta at which spot it adheres to the chorion much more firmly.
The layer of coagulable lymph, which is effused upon its internal surface, and which forms the membrana decidua of Hunter, is present, and the uterus undergoes a slight increase of volume.
Some of them which I have found more deeply embedded in the decidua were completely closed sacs.
That portion of the decidua which passes between the placenta and uterus during the latter half of gestation, is called the placental decidua, the description of which will be given with that of the placenta.
Wrisberg, professor of anatomy at Goettingen, considered that this membrane was distinct from the decidua reflexa, since with care the two membranes can be easily separated.
So the decidua reflex is to pass away with the birth, and the deciduavera is to change back again into its normal condition.
Within this is the decidua reflex, the membrane of the womb, which extended itself and grew around the ovum, completely enclosing it.
The outer one of these is the inner lining of the womb itself, known as the decidua vera.
Finally, there is a special significance in the fact, established by Selenka in 1890, that the anthropoid apes share with man the peculiar structure of the discoid placenta, the decidua reflexa, and the pedicle of the allantois.
The placentaldecidua serotina is that part of the preceding which is completely transformed by the ingrowth of the chorion-villi, and is used for constructing the placenta.
The inner decidua reflexa is formed by the rise of a circular fold of the mucous lining (at the border of the decidua vera and serotina), which grows over the foetus (like the anmnion) to the end.
The internal or false decidua (interna or reflexa, Figure 1.
We find a decidua of this kind in most of the higher placentals; but it is only in man and the anthropoid apes that it divides into three parts--the outer, inner, and placental decidua.
The placental or spongy decidua (placentalis or serotina, Figure 1.
In some of the Lemurs (Tarsius) a discoid placenta with decidua is developed.
All the higher Placentals that have thisdecidua are classed together as the "Deciduates.
The tearing away of the decidua at birth naturally causes the mother to lose a quantity of blood, which does not happen in the Indecidua.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "decidua" in a variety of sentences. We hope that you will now be able to make sentences using this word.
