2009 Group Project 4: Difference between revisions

From Embryology
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===Timeline of Development===
===Timeline of Development===
===Staging===
===Staging===
Theiler Stage
(Scale in microns)
Embryonic age in Days Post Coitum (dpc)
Stage characteristic
Cell characteristics
Zona pellucida
Location/ changes in site
1
0-0.9
(range 0-0.25)
One-celled embryo (fertilized)
One cell
Present
2
1
(range 1-2.5)
Dividing egg
2-4 cells
- 1st cleavage after 24hrs
Present
3
2
(range 1-3.5)
Morula (early to fully compacted)
4-16 cells
Present
Oviduct. Usually near utero-tubal junction.
4
3
(range 2-4)
Change from Morula to Blastocyst
-Intra-cellular matrix
-Blastocoelic cavity evident
16-40 compacted cells
-Iinner cell mass
-Outer layer of trophectoderm cells
Present
Uterine lumen
5
4
(range 3-5.5)
Zona free Blastocyst
Absent
Uterine lumen


===History of Model Use===
===History of Model Use===

Revision as of 16:03, 22 August 2009