Clear cut case. The bio-mom donated her eggs to the other woman. The other woman is the legal mother of the child conceived from donated eggs.
To decide otherwise would invite chaos as women who donated eggs to infertile couples could declare custody of children not born to them.
the womb mother may have the girl for now but someday she’ll come looking for her biological mother
as Mom of an adoptee, I know
Bio Mom must be really screwed up for the courts to not have at least given her visitation, aka “daddy” privilgegs
But in this case the donor donated the egg to her own partner, not another infertile couple. She never intended for the child not to be hers.