BGDA Practical Placenta - Maternal Decidua: Difference between revisions
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== Uterus == | |||
<gallery> | |||
Image:Uterus proliferative phase.jpg|Uterus proliferative phase | |||
Image:Uterine gland proliferative phase.jpg|Uterine gland proliferative phase | |||
Image:Uterus secretory phase.jpg|Uterus secretory phase | |||
Image:Uterine gland secretory phase.jpg|Uterine gland secretory phase | |||
</gallery> | |||
* Endometrium - 3 layers in secretory phase of menstrual cycle: compact, spongy, basal | |||
* Myometrium - muscular layer outside endometrium, contracts in parturition | |||
* Perimetrium - tunica serosa of the uterus continuous with the peritoneal wall | |||
===Endometrial Layers=== | |||
* Compact - implantation occurs in this layer, dense stromal cells, uterine gland necks, capillaries of spiral arteries | |||
* Spongy - swollen stromal cells, uterine gland bodies, spiral arteries | |||
* Basal - not lost during menstruation or childbirth, own blood supply | |||
===Decidual Reaction=== | |||
* occurs initially at site of implantation and includes both cellular and matrix changes | |||
* reaction spreads throughout entire uterus, not at cervix | |||
* deposition of fibrinoid and glycogen and epithelial plaque formation (at anchoring villi) | |||
* presence of decidual cells are indicative of pregnancy | |||
Cervix - at mouth of uterus, secretes mucus (CMP), forms a plug/barrier, mechanical and antibacterial | |||
Vascular - increased number of blood vessels | |||
===Decidua=== | |||
The endometrium becomes the decidua and forms 3 distinct anatomical regions (at approx 3 weeks) | |||
* Decidua Basalis at implantation site | |||
* Decidua Capsularis enclosing the conceptus | |||
* Decidua Parietalis the remainder of uterus | |||
** Decidua Capsularis and Parietalis fuse eventually fuse and uterine cavity is lost by 12 weeks | |||
Revision as of 12:29, 20 May 2012
Practical 14: Implantation and Early Placentation | Villi Development | Maternal Decidua | Cord Development | Placental Functions | Diagnostic Techniques | Abnormalities |
Content to be added.
Uterus
- Endometrium - 3 layers in secretory phase of menstrual cycle: compact, spongy, basal
- Myometrium - muscular layer outside endometrium, contracts in parturition
- Perimetrium - tunica serosa of the uterus continuous with the peritoneal wall
Endometrial Layers
- Compact - implantation occurs in this layer, dense stromal cells, uterine gland necks, capillaries of spiral arteries
- Spongy - swollen stromal cells, uterine gland bodies, spiral arteries
- Basal - not lost during menstruation or childbirth, own blood supply
Decidual Reaction
- occurs initially at site of implantation and includes both cellular and matrix changes
- reaction spreads throughout entire uterus, not at cervix
- deposition of fibrinoid and glycogen and epithelial plaque formation (at anchoring villi)
- presence of decidual cells are indicative of pregnancy
Cervix - at mouth of uterus, secretes mucus (CMP), forms a plug/barrier, mechanical and antibacterial Vascular - increased number of blood vessels
Decidua
The endometrium becomes the decidua and forms 3 distinct anatomical regions (at approx 3 weeks)
- Decidua Basalis at implantation site
- Decidua Capsularis enclosing the conceptus
- Decidua Parietalis the remainder of uterus
- Decidua Capsularis and Parietalis fuse eventually fuse and uterine cavity is lost by 12 weeks
Terms
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Cite this page: Hill, M.A. (2024, May 19) Embryology BGDA Practical Placenta - Maternal Decidua. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/BGDA_Practical_Placenta_-_Maternal_Decidua
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G