Surrogate Pregnancy - 2 Mothers

Parshas Vayeitzei discusses surrogate pregnancy - see this post. This week, the following story came out of England:

A same-sex couple has become the first in the world to carry the same baby in both their wombs as part of a landmark “shared motherhood” procedure. British couple Jasmine and Donna Francis-Smith welcomed their son, Otis, two months ago. The baby was born via in vivo natural fertilisation, which involves the eggs being incubated in the mother’s body, rather than externally, as is the case with in vitro fertilisation (IVF). The AneVivo procedure, which was pioneered by Swiss technology company Anecova and carried out at the London Women’s Clinic, involved the eggs of the biological mother being placed inside a miniature capsule and inserted into her womb, where they were incubated. After the incubation of the eggs, they were taken out of the first mother’s womb and placed into the womb of the gestational mother, who carried the baby to term.

So now two mothers carried this baby; like Tosfos (Kesuvos 4b s.v. ad) מכל מקום כמה דברים אשכחן דלא שכיח ומיירי בהן הש"ס לדרוש ולקבל שכר כדאמרינן בפרק המקשה (חולין ע.) בלעתו חולדה והוציאתו והכניסתו והקיאתו ויצא מאליו מהו הדביק שני רחמים ויצא מזה לזה מהו אף על פי שלא יבא לעולם where he quotes Chullin 70a where Rava asked if you connected two wombs and the [fetus] left the first and entered the second [which mother is the mother] we see technology is coming very close to that situation. (I think this news story where the egg was only in the first womb for 18 hours has minimal significance. Had it been for at least 40 days, then it would present more issues.) But this case is pushing the frontier to having multiple surrogates for the same fetus. Source here