Image Gallery
Six-Cell Embryo
![Six-Cell Embryo [Click for next image]](/images/prenatal_unlabeled_655/six-cell-embryo.jpg "Click for next image")
| Source: Centro Riproduzione Assistita, Catania, Italy. |
Note:The three-dimensional nature of the developing embryo becomes more evident with each cell division.Label Key:1. perivitelline space 2. zona pellucida 3. blastomere "in the middle" |
| All ages referenced to fertilization, not last menstrual period. |
Four-Cell Embryo
Five-Cell Embryo
Six-Cell Embryo
Seven-Cell Embryo
Eight-Cell Embryo
Nine-Cell Embryo
