I just read this story - incredible. Here is another story about a family in which there was isoimmunization - the mother's antibodies were attacking the fetus' antigens - which put the fetus at risk of severe anemia during the pregnancy. Here too, in-utero blood transfusions (a total of five) were performed and were able to bring to a successful birth at 36 weeks.
I remember once seeing a documentary on tv about surgery performed on an embryo (a story like this one) and the documentary following through until after the birth. What I found to be completely mind blowing was that there were no scars.