What is the ruling on transplanting a woman's ovary to another, and who is the mother of the children in this case?

It is not permissible to transfer a woman's ovaries to another woman, as this leads to confusion of lineage. If this occurs, the true mother of the child is the owner of the ovum, as the child inherits genetic traits from her. As for the owner of the womb, she is a mother by legal ruling, similar to a wet nurse.