The following biological definition comes from Australia (NHMRC 2006) discussion.
- "human embryo means a discrete entity that has arisen from either:
- (a) the first mitotic division when fertilisation of a human oocyte by a human sperm is complete; or
- (b) any other process that initiates organised development of a biological entity with a human nuclear genome or altered human nuclear genome that has the potential to develop up to, or beyond, the stage at which the primitive streak appears; and has not yet reached 8 weeks of development since the first mitotic division."
(More? NHMRC Discussion paper - biological definition PDF | PMID 17178746)
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