Slideshow: Early Events
Six-Cell Embryo
#45, Slide 8 of 24
52 hours
| 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. |
