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Fertilized oocyte day 1. Adjacent and almost centered
pronuclei (PN) containing many dispersed nucleoli. Two polar bodies at
11:00. The cytoplasm is retracted with an important halo effect on the
right. No laser drilling. |
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Fertilized oocyte day 1. Adjacent and centered
pronuclei (PN) containing few dispersed nucleoli. Polar bodies are out of
focus. The cytoplasm is retracted with an important halo effect. No laser
drilling. |
Embryo on day 2. Four equally sized blastomeres |
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Embryo on day 2. Four unequally sized blastomeres |
Embryo on day 3. Eight equally sized blastomeres. |
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Extraction of the
blastomere. Intermediate phase (blastomere
is further extracted). |
Embryo on day 4. Morula stage. |
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Embryo on day 4. Morula stage. |
Compacting Embryo on day 4. |
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Embryo on day 4. Morula stage. |
Early blastocyst on day 4-5. Initiation of a
bastocoelic cavity. |
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Early blastocyst on day 4-5. Formation of a clearly
visible bastocoelic cavity, zona 19.4µm. |
Expanding blastocyst on day 5-6. Inner cell mass
visible in the lower portion. Zona thickness between 4.9 µm and 8.2 µm. |
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Expanding blastocyst on day 5-6. Zona thickness
between 3.7 µm and 4.7 µm. |
