Blastula. hollow sphere of cells, surrounding a cavity blastocoele. stage of segmentation of a fertilized ovum. Human embryonic development. Vector illustration premium vector by Betty1994

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vector ball illustration human female growth health healthy medicine medical stem early egg embryo cell development stage biology science baby cells genetic nucleus fertility division diagram reproduction stages pregnancy fertilization Microscopic ovum ovulation reproductive implantation embryology oocyte zygote segmentation fertilized embryonic blastocyst morula blastula blastoderm blastocoel

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