substitute
6 Meaning of human embryo —Act
(1) In this Act:
"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.
(2) However, "human embryo" does not include a—
(a) hybrid embryo; or
(b) human embryonic stem cell line.
(3) In working out the length of the period of development of a human embryo, any period when the development of the embryo is suspended is to be disregarded.