The woman who is carrying or has carried a child as a result of the placing in her of an embryo or of sperm and eggs, and no other woman, is to be treated as the mother of the child.

Subsection (1) above does not apply to any child to the extent that the child is treated by virtue of adoption as not being the child of any person other than the adopter or adopters.

Subsection (1) above applies whether the woman was in the United Kingdom or elsewhere at the time of the placing in her of the embryo or the sperm and eggs.