Talk:Carnegie stage 18
From Embryology
Stage 18 development indices
- number of semicircular ducts (1-3).
- length of the paramesonephric duct.
| 18 | 109 | 1897 | tubal |
| 18 | 144 | 1899 | |
| 18 | I75 | 1900 | tubal |
| 18 | 296 | 1905 | |
| 18 | 317 | 1905 | |
| 18 | 351 | 1904 | injected |
| 18 | 406 | 1907 | |
| 18 | 423 | 1904 | |
| 18 | 424 | 1904 | |
| 18 | 492 | 1911 | injected (india ink) |
| 18 | 511 | 1911 | |
| 18 | 670 | 1913 | tubal |
| 18 | 719 | 1913 | |
| 18 | 733 | 1913 | |
| 18 | 841 | 1914 | |
| 18 | 899 | 1914 | tubal head injured |
| 18 | 991 | 1914 | |
| 18 | 1909 | 1917 | |
| 18 | 2673 | 1919 | |
| 18 | 4430 | 1923 | |
| 18 | 5542B | 1923 | other twin abnormal |
| 18 | 5747 | 1928 | |
| 18 | 5935A | 1929 | other twin stunted |
| 18 | 6522 | ? | |
| 18 | 6524 | ? | |
| 18 | 6525 | ? | |
| 18 | 6527 | ? | |
| 18 | 6528 | ? | |
| 18 | 6529 | ? | |
| 18 | 6533 | ? | |
| 18 | 6551 | 1932 | |
| 18 | 7707 | 1939 | |
| 18 | 8097 | 1942 | |
| 18 | 8172 | 1943 | operative |
| 18 | 8235 | 1944 | tubal |
| 18 | 8355 | 1946 | tubal |
| 18 | 8812 | 1950 | rubella |
| 18 | 8945 | 1952 | Uni of Chicago No. 1254 |
| 18 | 9107 | 1918 | Uni of Chicago No. 516 |
| 18 | 9247 | 1954 | tubal |
Tissue Development
Abdominal Wall Muscle
Carnegie stage 18 (E44) the separation of the myoblasts into distinct inner and outer layers became evident, and appeared to be equivalent to those in the E12.5 mouse embryo in terms of overall histological appearance and distance migrated by the myoblasts. The myoblasts in both the inner and outer layers began to exhibit unidirectional orientation. The abdominal wall was thicker (500 μm) in the region where secondary structures were forming compared with the primary body wall region (260 μm). In the more dorsally positioned regions, the outermost layer of connective tissue comprised approximately half of this thickness. PMID 22976993
