Slideshow: Early Events
Seven-Cell Embryo
#46, Slide 9 of 24
54 hours
| Source: Centro Riproduzione Assistita, Catania, Italy. |
Note:As the cells divide and increase in number, the overall size of the embryo remains essentially unchanged. The large blastomere will be the next to divide.Label Key:1. zona pellucida 2. perivitelline space 3. large blastomere |
| All ages referenced to fertilization, not last menstrual period. |
