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2-cell embryos
Multinucleation and normal appearance

This abnormal 2-cell embryo is from in vitro fertilization from a 41 year-old woman
Multiple nuclei (circular structures that look like moon craters) are seen in both cells
This chromosomally abnormal embryo was not transferred

Learn more about egg quantity and quality problems

Learn more about age and fertility problems

This is a normal 2-cell embryo