| Morula | Blastula |
| 1. Morula is the embryonic stage formed after the completion of cleavage. | 1. Blastula is the embryonic stage formed after the completion of blastulation. |
| 2. Morula is formed 4 to 6 days after the fertilization. | 2. Blastula is formed 6 to 7 days after the fertilization. |
| 3. Morula consists of 16 cells. | 3. Blastula consists of more than 64 cells. |
| 4. Morula is solid ball of cells. | 4. Blastula is a hollow ball of cells. |
| 5. Morula stage is passed in fallopian tube, once it reaches uterus, it starts developing into the next stage. | 5. Blastula after reaching the uterus is implanted on the wall of uterus. |
| 6. Morula does not have any distinction of its inner cell structure. | 6. Blastula has a blastocoel, trophoblast and inner cell mass. |
