Human embryo grades
- K. Hardy
- Digital Images
- Online
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Description
Diagram showing human embryo grades for in vitro
fertilisation (IVF). Grade 1 is the best quality
four-cell stage embryo and would be selected for
replacement in the uterus. Grade 2 is of a lower
quality, but is still viable and might be used if
there is a shortage of grade 1 embryos. Grades 3
and 4 are poor quality and would not be used.