decidua
Sign in to saveThe decidua is the modified mucosal lining of the uterus (that is, modified endometrium) that forms every month, in preparation for pregnancy. It is shed off each month when there is no fertilized egg to support. The decidua is under the influence of progesterone. Endometrial cells become highly characteristic. The decidua forms the maternal part of the placenta and remains for the duration of the pregnancy. After birth the decidua is shed together with the placenta.
Key facts
- Anatomy.Name
- Decidua
- Anatomy.Image
- Gray33.png
- Anatomy.Caption
- Diagrammatic sections of the uterine mucous membrane: A. The non-pregnant uterus. B. Decidua parietalis; the mucous membrane in the pregnant uterus and not beneath the placenta.
- Anatomy.Image2
- Gray34.png
- Anatomy.Caption2
- Sectional plan of the gravid uterus in the third and fourth month
via Wikipedia infobox
Research
10,081 papers- Immunology of the maternal-fetal interface.Annual review of immunology · 2013
- Antigen-presenting cells in the decidua.Chemical immunology and allergy · 2005
- CCR8(+) decidual regulatory T cells maintain maternal-fetal immune tolerance during early pregnancy.Science immunology · 2025
- Immunoregulatory cells in human decidua: morphology, immunohistochemistry and function.Reproduction, nutrition, developpement · 1988
- Immune Deviation in the Decidua During Term and Preterm Labor.Frontiers in immunology · 2022
via PubMed
Wikidata facts
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- Commons category
- Decidua
via Wikidata · CC0
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Article
10 sectionsContents
- Structure
- Development
- Function
- Hormone production
- Other
- Clinical significance
- Etymology
- Additional images
- References
- External links
The decidua is the modified mucosal lining of the uterus (that is, modified endometrium) that forms every month, in preparation for pregnancy. It is shed off each month when there is no fertilized egg to support. The decidua is under the influence of progesterone. Endometrial cells become highly characteristic. The decidua forms the maternal part of the placenta and remains for the duration of the pregnancy. After birth the decidua is shed together with the placenta.
==Structure== 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 luminal side, enclosing it into the endometrium. The remainder of the decidua is termed the decidua parietalis or decidua vera, and it will fuse with the decidua capsularis by the fourth month of gestation.