Human blastocyst hatching
- K. Hardy
- Digital Images
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About this work
A human embryo at the blastocyst stage, about six days after fertilization, viewed under a light microscope. The embryo is in the process of "hatching" out of the zona pellucida - the tough outer membrane - just before implanting in the wall of the uterus. The actual size of the embryo is about 0.3 mm. Biomedical Image Awards 1997.