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ECB-STAGE-13
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Name: 1-cell stage
ECAO ID: 0000140 Definition: "A fertilized egg, right after fertilization. The embryo is characterized morphologically by the fact that it is a single diploid cell surrounded by a fertilization envelope. This stage corresponds to an embryo of age 0 hour post-fertilization." |
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| Preceded By: stage 1 | Succeeded By: 2-cell stage |