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Slideshow: Entire Image Gallery by EHD
Five-Cell Embryo
#44, Slide 21 of 312
50 hours
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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.