The family of a baby who had a life-saving blood-transfusion while still in the womb have thanked the donors whose specialist blood made the rare procedure possible.
Arthur Ransom is one of the youngest patients in the UK to have had a blood transfusion, delivered when his mother was just 16 weeks pregnant when he was the size of an avocado.
The tiny transplant was given after he contracted the common childhood illness parvovirus or slapped cheek syndrome, while still in the womb.
The virus usually causes children to develop a high temperature, a runny nose and a rash, but due to Arthur’s immature immune system, it made him seriously unwell.
It made him severely anaemic, leading to a dangerous build-up of fluid, which in turn led to Arthur having heart failure. But the blood transfusion at St George’s Hospital in London in 2024, delivered oxygen to Arthur’s body so the fluid around his heart and organs could be reabsorbed, reducing the strain on his body and heart.
He was born in January 2025 and is now “doing great”, his mother Maisie Ransom, from Cranleigh in Surrey said.
“The experience was absolutely terrifying,” she said. “He was so small the doctors were working within millimetres.
“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.
“The doctor said to the best of her knowledge there was no-one younger to get an intrauterine transfusion.”
The 30-year-old primary school teacher added: “Arthur’s doing great now, he’s a really chirpy little boy, reaching all the milestones.
“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.”
Ms Ransom joined NHS Blood and Transplant (NHSBT) to thank the donors who made the intrauterine transfusion (IUT) possible.
The donation authority has identified the eight donors whose blood has been used the most to make the product used in an IUT.
Several strict criteria must be met for donors to be eligible to donate for this rare procedure, which can be needed when babies become extremely unwell with anaemia before they are born.
Donors need to be men, have type O blood which is “Kell negative” and also negative for cytomegalovirus.
Their blood is made into small packs of extremely concentrated red cells, which are then transfused via needle and guided by ultrasound.
Only around 180 IUT units are issued each year by NHSBT.
Dr Anne Kelly, paediatric transfusion and components clinical expert for NHSBT, explained Intrauterine transfusions are only done when it’s needed to save a life.
“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 added.
Paul Bickley, 45, who has been identified as one of the men who has donated the most for IUT procedures, said he started donating blood because of his mother’s “generous heart”.
The father of four, from Richmond, who is a vice president of an insurance company, said: “I started donating because my mum and dad donate.
“My mum told me it is a good thing to do to give back literally and metaphorically to society.
“She just has a 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.
“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.”
David Smith, 64, from Westminster in London, has also been identified as a donor whose blood has been used the most for these specialist transfusions.
The retired heating and ventilation engineer, who has donated more than 80 times overall, said: “When I found out I was O negative I thought I would keep doing this.
“You can’t not do it if you can help babies, you have to.
“It’s always a pleasure to donate, whether it’s used for babies or for anyone.”
Dr Luci Etheridge, consultant paediatrician and chief medical officer at St George’s, said: “For babies like Arthur, a blood transfusion while still in the womb can mean the difference between life and loss.
“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.”
