Laser Assisted Hatching of Vitrified Embryos

A human egg or oocyte is surrounded by an outer protective shell known as the zona pellucida. As an embryo develops from zygote (day 1) to blastocyst (day 5), the outer zona progressively thins (see photos of day 3 embryo with thicker zona and day 5 blastocyst with thin zona). This ultimately enables the embryo […]

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