(1)  In this Act, unless the contrary intention appears –

animal does not include a human;

chimeric embryo means –

(a) a human embryo into which a cell, or any component part of a cell, of an animal has been introduced; or

(b) a thing declared by the regulations to be a chimeric embryo;

human embryo means a live embryo that has a human genome or an altered human genome and that has been developing for less than 8 weeks since the appearance of 2 pro-nuclei or the initiation of its development by other means;

human embryo clone means a human embryo that is a genetic copy of another living or dead human, but does not include a human embryo created by the fertilisation of a human egg by human sperm;

human sperm includes human spermatids;

hybrid embryo means –

(a) an embryo created by the fertilisation of a human egg by animal sperm; or

(b) an embryo created by the fertilisation of an animal egg by human sperm; or

(c) a human egg into which the nucleus of an animal cell has been introduced; or

(d) an animal egg into which the nucleus of a human cell has been introduced; or

(e) a thing declared by the regulations to be a hybrid embryo;

precursor cell means a cell that has the potential to develop into a human egg or human sperm;

prohibited embryo means –

(a) a human embryo created by a process other than the fertilisation of a human egg by human sperm; or

(b) a human embryo created outside the body of a woman, unless the intention of the person who created the embryo was to attempt to achieve pregnancy in a particular woman; or

(c) a human embryo that contains genetic material provided by more than 2 persons; or

(d) a human embryo that has been developing outside the body of a woman for a period of more than 14 days, excluding any period when the development is suspended; or

(e) a human embryo created using precursor cells taken from a human embryo or human fetus; or

(f) a human embryo that contains a human cell (within the meaning of section 14 ) whose genome has been altered in such a way that the alteration is heritable by human descendants of the human whose cell was altered; or

(g) a human embryo that was removed from the body of a woman by a person intending to collect a viable human embryo; or

(h) a chimeric embryo or a hybrid embryo;

woman means a female human.

(2)  For the purposes of establishing that a human embryo clone is a genetic copy of another living or dead human –

(a) it is sufficient to establish that the set of genes in the nuclei of the cells of the living or dead human has been copied; and

(b) it is not necessary to establish that the copy is an identical genetic copy.

(3)  For the purposes of the definition of "human embryo" in subsection (1) , 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.

(4)  For the purposes of the definition of "human embryo clone" in subsection (1) , a human embryo that results from the technological process known as embryo splitting is taken not to be created by a process of fertilisation of a human egg by human sperm.