Image Gallery
Five-Cell Embryo
![Five-Cell Embryo [Click for next image]](/images/prenatal_unlabeled_655/five-cell-embryo.jpg "Click for next image")
| Source: Centro Riproduzione Assistita, Catania, Italy. |
Note:Counting the number of blastomeres is not so easy anymore.Label Key:1. zona pellucida 2. perivitelline space |
| All ages referenced to fertilization, not last menstrual period. |
Four-Cell Human Embryo
Four-Cell Embryo
Five-Cell Embryo
Six-Cell Embryo
Seven-Cell Embryo
Eight-Cell Embryo
