Gynekologisk ordliste

Zona pellucida

A layer of glycoprotein around a developing ovule in an ovarian follicle. It plays a role in fertilisation when it is penetrated by the sperm. It persists when the zygote is dividing until the stage of a blast cyst. This is when it degenerates and disappears just before the process of implantation.

La oss snakke

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