You can ask the Lab Director (or physician) to give you progress reports on the development of your embryos. Critical points in development are (1) fertilization, (2) 4 to 8 cell stage and (3) morula to blastocyst stage.
Numeric grading systems for multicell embryos usually have 4 levels:
Grade 1: even cell division, no fragmentation
Grade 2: even cell division, small fragmentation
Grade 3: uneven cell division, moderate fragmentation
Grade 4: uneven cell division, excessive fragmentatio
The
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