decidua

decidua
SYN: deciduous membrane. [L. deciduus, falling off (qualifying membrana, membrane, understood)]
- d. basalis the area of endometrium between the implanted chorionic vesicle and the myometrium, which develops into the maternal part of the placenta. SYN: d. serotina.
- d. capsularis the layer of endometrium overlying the implanted chorionic vesicle; it becomes progressively attenuated as the chorionic vesicle enlarges and, by the fourth month, is squeezed against the d. parietalis and thereafter undergoes rapid regression. SYN: d. reflexa, membrana adventitia (2).
- ectopic d. decidual cells which may be found in the cervix, appendix, or areas other than the endometrium.
- d. menstrualis the succulent mucous membrane of the nonpregnant uterus at the menstrual period.
- d. parietalis the altered mucous membrane lining the main cavity of the pregnant uterus other than at the site of attachment of the chorionic vesicle. SYN: d. vera.
- d. polyposa d. parietalis showing polypoid projections of the endometrial surface.
- d. reflexa SYN: d. capsularis.
- d. serotina SYN: d. basalis.
- d. spongiosa the portion of the d. basalis attached to the myometrium.
- d. vera SYN: d. parietalis.

* * *

de·cid·ua di-'sij-ə-wə n, pl -uae -.wē
1) the part of the mucous membrane lining the uterus that in higher placental mammals undergoes special modifications in preparation for and during pregnancy and is cast off at parturition, being made up in the human of a part lining the uterus, a part enveloping the embryo, and a part participating with the chorion in the formation of the placenta see DECIDUA BASALIS, DECIDUA CAPSULARIS, DECIDUA PARIETALIS
2) the mucous membrane of the uterus cast off in the ordinary process of menstruation
de·cid·u·al -ə-wəl adj

* * *

n.
the modified mucous membrane that lines the wall of the uterus during pregnancy and is shed with the afterbirth at parturition (see endometrium). There are three regions: the decidua capsularis, a thin layer that covers the embryo; the decidua basalis, where the embryo is attached; and the <, which is not in contact with the embryo.
decidual adj.

* * *

de·cid·ua (də-sidґu-ə) [L., from deciduus, from decidere to fall off] the endometrium of the pregnant uterus, all of which, except the deepest layer, is shed at parturition. Called also decidual or deciduous membrane. decidual adj

Medical dictionary. 2011.

Look at other dictionaries:

  • Decidua — Diagrammatic sections of the uterine mucous membrane: A. The non pregnant uterus. B. Decidua parietalis; the mucus membrane in the pregnant uterus and not beneath the placenta …   Wikipedia

  • Decidua — Saltar a navegación, búsqueda Secciones diagramáticas de la mucosa uterina: A. útero no grávido. B. útero grávido. En obstetricia se usa el término decidua para la recubierta uterina (endometrio) específicamente durante el gestación, el cual da… …   Wikipedia Español

  • decidua — f. embriol. Caduca uterina. Medical Dictionary. 2011. decidua mucosa en la que se transforma el …   Diccionario médico

  • decidua — [dē sij′o͞o ə] n. pl. deciduae [dē sij′o͞oē] or deciduas [ModL ( membrana) decidua, deciduous (membrane), orig. fem. of L deciduus: see DECIDUOUS] a mucous membrane lining the uterus during pregnancy, cast off at childbirth decidual adj …   English World dictionary

  • Decidua — De*cid u*a (?; 135), n. [NL., fr. L. deciduus. See {Deciduous}.] (Anat.) The inner layer of the wall of the uterus, which envelops the embryo, forms a part of the placenta, and is discharged with it. [1913 Webster] || …   The Collaborative International Dictionary of English

  • Decidŭa — (lat., abfallende Haut), die verdickte Schleimhaut der Gebärmutter, löst sich bei der Menstruation in ihren oberflächlichen Schichten ab und wird mit dem unbefruchteten Ei ausgestoßen (D. menstrualis). Ist jedoch ein befruchtetes Ei in die… …   Meyers Großes Konversations-Lexikon

  • Decidua — Decidŭa (lat.), die äußere oder hinfällige Haut des Embryos der höhern Säugetiere (Deciduata, s.d.), aus der veränderten Gebärmutterschleimhaut hervorgehend …   Kleines Konversations-Lexikon

  • Decidua —   [zu lateinisch deciduus »abfallend«] die, , Siebhaut, die hormonell für die Aufnahme des Keims entsprechend umgebildete, bei der Menstruation und der Geburt unter größeren Blutungen wieder abgestoßene obere Schicht der Gebärmutterschleimhaut;… …   Universal-Lexikon

  • decídua — s. f. O que fica no útero e é expulso depois do parto. = PÁREAS, SECUNDINAS   ‣ Etimologia: feminino de decíduo …   Dicionário da Língua Portuguesa

  • decidua — n. the modified mucous membrane that lines the wall of the uterus during pregnancy and is shed with the afterbirth at parturition (see endometrium). There are three regions: the decidua capsularis, a thin layer that covers the embryo; the decidua …   The new mediacal dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”