Surrogate mothers, who are descending in from the 990,000,000, I've got an open firmirment around the formation of these buildings, and 2nd or even 3rd, versions of your girl can help with childbearing before getting fully or partially consummated down here,
They will probably donate to the naturalborn couples as a favor just being grateful to be here.
This is not moral and deemed immoral, and unnecessary, surrogate mothers will remain completely independent and of freewill.