Template:Mall1918 table5
From Embryology
| Table 3 | ||
| Stage | Length of Embryo | Approximate Age |
|---|---|---|
| 1. Preparatory period | Less than 20 mm. | (?) 25 |
| 2. Exoplasrnic development | (I) 20-30 | 25-30 |
| 3. Exoplasmic development | (II) 39- 55 | 30—40 |
| 4. Transitory period | 55-140 | 40-75 |
| 5. Endoplasmic development | (I) 140-170 | 75—105 |
| 6. Endoplasmic development | (11) 170—220 | 105-110 |
| 7. Retrogression | 220-290 | 110 to term |
