2009 Group Project 4: Difference between revisions

Revision as of 15:48, 22 August 2009

MOUSE

Timeline of Development

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

Genetics

Current Embryology Research

ANAT2341 group projects

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