Slideshow: Early Events
Five-Cell Embryo
#44, Slide 7 of 24
50 hours
| 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. |
