Arthur Underwent Life-Saving Surgery at 16 Weeks in Utero—Now Thriving One Year Later

The family of a baby who received a life-saving blood transfusion while still in the womb has expressed gratitude to the donors whose specialist blood made the rare procedure possible. Arthur Ransom, now one year old and described as “doing great,” underwent the transfusion at 16 weeks gestation after contracting parvovirus, also known as slapped cheek syndrome, while in utero.

At just 16 weeks pregnant, Arthur’s mother, Maisie Ransom, a primary school teacher from Cranleigh in Surrey, learned her unborn son had developed severe anaemia due to the virus, which led to a dangerous build-up of fluid around his heart and organs, resulting in heart failure. Professor Asma Khalil, who performed the procedure at London’s St George’s Hospital, told the family it “would take a miracle” to save his life, before adding: “But I believe in miracles.”

The intrauterine blood transfusion delivered oxygen to Arthur’s body, allowing the fluid around his heart and organs to be reabsorbed and reducing the strain on his developing system. Doctors confirmed that Arthur is one of the youngest patients in the UK to have received such a transfusion, with the procedure taking place when he was the size of an avocado.

Arthur was born in January 2025 and has since reached all developmental milestones. His mother said: “Arthur’s doing great now, he’s a really chirpy little boy, reaching all the milestones.” She added that the experience was “absolutely terrifying,” noting that doctors were working within millimetres due to his tiny size.

“Without that blood he would not have made it – his organs were failing, his heart was completely enveloped in fluid and it was struggling to pump,” Maisie Ransom said. She also expressed a desire to identify the blood donor: “I do often wonder who the person to donate was as I would love to tell them that their decision to give blood gave my boy the chance to be here.”

The NHS Blood and Transplant service (NHSBT) supported the procedure, which remains a rare but critical intervention for fetuses suffering from viral-induced anaemia. While parvovirus typically causes mild symptoms in children, Arthur’s immature immune system made him unable to fight the infection, leading to life-threatening complications.

Medical teams continue to monitor Arthur’s progress, though his mother reports he is thriving and in good health one year after birth. The case highlights the potential of fetal medicine to intervene in severe conditions long before delivery, offering hope for similar cases in the future.