Talk:Rat Development Stages
From Embryology
| 1 | 1 | 1 | 0.07 | 1 cell (in oviduct) |
| 2 | 2 | 0.08 x 0.06 | 2 cells (in oviduct) | |
| 3 | 3 | 0.08 x 0.05 | 4 cells (in oviduct) | |
| 4 | 3.25 | 8-12 cells (in oviduct) | ||
| 5 | 2 | 3.5 | 0.08 x 0.04 | Morula (in uterus) |
| 6 | 4 | (0.08 x 0.03) | Early blastocyst (in uterus) | |
| 7 | 3 | 5 | (0.12 x 0.05) | Free blastocyst (in uterus) |
| 8 | 4 | 6 | (0.28 x 0.07) | Implanting blastocyst, with trophoblastic cone and inner cell mass; outgrowth of endoderm (hypoblast) |
| 9 | 6.75 | Diplotrophoblast; inner cell mass (pendant), covered with endoderm | ||
| 10 | 5 | 7.25 | (0.3 x 0.1) | Near complete implantation; pendant begins differentiation into embryonic and extra-embryonic parts |
| 11 | 7.75 | (0.5 x 0.1) | Completion of implantation; primary amniotic cyst; ectoplacental cone | |
| 12 | 6 | 8.5 | (1.04 x 0.26) | Connecting ectochorionic and amniotic cavities; rudiments of amniotic folds; primitive streak; start of 3rd layer formation; blastemas of heart and pericardium |
| 13 | 7 | 9 | 1.0 | Presomite neurula; fusion of chorio-amniotic folds, chorio-amniotic stalk; neural plate; embryo bent dorsally; bud of allantoic stalk |
| 14 | 9.5 | 1.5 | Somites 1-4 (occipital); pendant with 3 cavities: ectochorionic cyst, exocoelom, and amniotic cavity; ectochorionic cyst collapsing; allantoic stalk projects into exocoelom; embryo bent dorsally | |
