British Infant Receives Life-Saving Blood Transfusion While Still in the Womb
The family of a baby who underwent a life-saving blood transfusion while still in the womb has expressed profound gratitude to the donors whose specialized blood made this rare medical procedure possible. Arthur Ransom is believed to be one of the youngest patients in the United Kingdom to have received such a transfusion, administered when his mother was merely 16 weeks pregnant.
A Tiny Patient in Critical Condition
At approximately the size of an avocado, Arthur contracted the common childhood illness parvovirus, also known as slapped cheek syndrome, while still developing in utero. While this virus typically causes mild symptoms like a high temperature, runny nose, and rash in children, it proved devastating for Arthur due to his immature immune system. The infection led to severe anaemia, causing a dangerous accumulation of fluid around his heart and organs, which subsequently resulted in heart failure.
The crucial intervention occurred at St George's Hospital in London during 2024. Doctors performed an intricate intrauterine transfusion, delivering oxygen-rich blood directly to Arthur's tiny body. This allowed the excess fluid surrounding his heart and organs to be reabsorbed, significantly reducing the strain on his cardiovascular system and ultimately saving his life.
A Mother's Terrifying Ordeal and Overwhelming Gratitude
Arthur was born in January 2025 and is now thriving. His mother, Maisie Ransom, a 30-year-old primary school teacher from Cranleigh in Surrey, described the experience as "absolutely terrifying." She recounted the precision required, noting that "doctors were working within millimetres" due to Arthur's minuscule 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 stated. "The doctor said to the best of her knowledge there was no-one younger to get an intrauterine transfusion."
She added that Arthur is now "doing great" and is a "really chirpy little boy, reaching all the milestones." Her thoughts often turn to the anonymous 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 Highly Specialized Donation Process
Maisie Ransom has joined NHS Blood and Transplant (NHSBT) to publicly thank the donors who made this intrauterine transfusion (IUT) possible. The donation authority has identified eight donors whose blood has been used most frequently to create the specialized product required for these rare procedures.
Donating blood for an IUT involves meeting several strict criteria. Eligible donors must be male, have type O blood that is "Kell negative," and also test negative for cytomegalovirus. Their blood is processed into small packs of extremely concentrated red blood cells, which are then transfused via a needle guided by ultrasound imaging.
Dr Anne Kelly, paediatric transfusion and components clinical expert for NHSBT, emphasized the critical nature of these transfusions. "We only supply blood from carefully selected donors and extra safety measures are applied as the patients are particularly vulnerable recipients because of their small size and developmental immaturity," she explained. Only around 180 IUT units are issued by NHSBT each year.
Donors Moved by the Impact of Their Gift
Paul Bickley, a 45-year-old father of four from Richmond and a vice president at an insurance company, is one of the men identified as a top donor for IUT procedures. He began donating blood following his parents' example, inspired by his mother's "generous heart."
"As the years went on and we had our own children I just realised life is very precious and that kept me donating," Bickley shared. "Hearing my blood was used in this way almost made me cry, to think a very small act of kindness on my part could have such a massive impact. It was mind-blowing and miraculous."
Another dedicated donor, David Smith, a 64-year-old retired heating and ventilation engineer from Westminster in London, has donated over 80 times. Upon discovering his O negative blood type, he felt compelled to continue. "You can't not do it if you can help babies, you have to," Smith stated. "It's always a pleasure to donate, whether it's used for babies or for anyone."
Medical Professionals Highlight the Procedure's Significance
Dr Luci Etheridge, consultant paediatrician and chief medical officer at St George's Hospital, underscored the life-or-death importance of these transfusions. "For babies like Arthur, a blood transfusion while still in the womb can mean the difference between life and loss," she said. "We are proud to provide this highly specialised, lifesaving care at St George's, and are deeply grateful to the donors whose generosity makes this possible, as well as to NHS Blood and Transplant for their vital and ongoing work."
This remarkable case highlights the extraordinary collaboration between specialized medical teams, stringent blood donation services, and selfless donors, culminating in a second chance at life for one very young patient.



