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Embryonic stage: zygote
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Embryonic stage: zygote

When the egg and sperm are fertilized, the zygote is formed. This embryonic stage is characterized by the presence of two pronuclei, two polar bodies and a clear and uniform cytoplasm.

If the zygote has the above characteristics, it is considered to be suitable for further development up to the time of transfer. If 1 or 3 pronuclei and/or polar bodies are observed, the embryo is discarded for transfer.

By (embryologist), (embryologist) and (babygest staff).
Last Update: 06/26/2019
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