Dr Mats Brannstrom, who is leading the medical team, said a womb transplant remained one of the most complex operations known to medical science. He said: “Technically it is lot more difficult than transplanting a kidney, liver or heart. The difficulty with it is avoiding hemorrhage and making sure you have long enough blood vessels to connect the womb. “You are also working deep down in the pelvis area and it is like working in a funnel. It is not like working with a kidney, which is really accessible.”Sara and her mother will undergo the surgery next Spring. The only previous womb transplant took place in Saudi Arabia in 2000 when a 26-year-old woman, who had lost her uterus due to hemorrhage, received a donated womb from a 46-year-old. The donated organ was removed 99 days later, due to complications.