For the first 19 months of their lives, Mercy and Goodness had never known what it was like to be apart.
Born in June 2023 in Nigeria's Ekiti State with their skulls fused together and their brains connected by delicate tissue and blood vessels, the twin sisters shared every smile, every milestone and every comforting moment of infancy because they had no other choice. Yet like any babies, they were surrounded by the love and devotion of their family from the very beginning.
On June 19, 2026, the sisters reached a milestone their family had dreamed of since they were born.
After months of careful planning and a series of pioneering operations led by Professor Noor ul Owase Jeelani and an international team of specialists in Abu Dhabi, Mercy and Goodness were successfully separated at 19 months. According to a press release obtained by The Bright Story from Gemini Untwined, they have since fully recovered and returned home to Nigeria, where they are beginning the childhood their family had long hoped for. The operation also marked the first successful separation of craniopagus twins in the United Arab Emirates.
Their remarkable journey began when they were just 6 months old.
After doctors diagnosed the girls with craniopagus, one of the rarest forms of conjoined twinning, they were referred to Gemini Untwined, the U.K.-based charity dedicated exclusively to researching and treating children born joined at the head.
According to BBC, citing Great Ormond Street Hospital, craniopagus twins account for about 5% of all conjoined twins and occur in approximately one in every 2.5 million births. The hospital also noted that about 40% of craniopagus twins are stillborn or die during labor, while another third die within their first 24 hours of life.
For Mercy and Goodness's family, hope meant leaving home.
In 2025, the girls and their parents traveled from Nigeria to Abu Dhabi, where they spent more than four months preparing for a series of surgeries. Far from home, the family placed their trust in a multinational team determined to give the sisters the opportunity to enjoy an ordinary childhood. During those months, doctors, nurses, therapists, engineers and specialists from the United Arab Emirates, the United Kingdom, Brazil and Nigeria worked side by side, carefully planning every stage of the girls' care before the first operation ever began.
Preparing for a New Beginning
Long before Mercy and Goodness entered the operating room, the medical team devoted months to understanding every detail of the girls' shared anatomy.
They carefully studied scans, created three-dimensional models, rehearsed different surgical approaches using virtual and mixed reality technology and used artificial intelligence to help plan the safest path forward. According to Gemini Untwined, several of those techniques had never before been combined in the separation of craniopagus twins.
BBC reported that surgeons were even able to rehearse the operation remotely using mixed reality technology, allowing specialists working in different countries to prepare together before Mercy and Goodness ever entered the operating room.
Over the next four months, Mercy and Goodness underwent four carefully planned operations while more than 60 health care professionals representing 20 nationalities worked together to care for them. Altogether, the team spent more than 40 hours in surgery, including a 12-hour final separation procedure that became Gemini Untwined's fastest separation of vertically conjoined craniopagus twins to date.
Leading the effort was Professor Noor ul Owase Jeelani, founder of Gemini Untwined and a consultant pediatric neurosurgeon at Great Ormond Street Hospital in London. He worked alongside Dr. Gabriel Mufarrej, head of pediatric neurosurgery at Brazil's Instituto Estadual do Cérebro Paulo Niemeyer, while Dr. Arun Rajeswaran oversaw Mercy and Goodness's care in the United Arab Emirates. They were joined by eight additional surgeons from the United Kingdom, Brazil and the UAE, supported by multinational anesthetic and operating-room specialists, as well as a 12-member multidisciplinary team from Great Ormond Street Hospital. Together, they brought expertise from three continents to help give the sisters a new beginning.
For Professor Jeelani, every innovation served a much larger purpose.
"The separation of Goodness and Mercy is a landmark case planned and executed with a precision not encountered before. Building on the experience of our previous eight cases, using novel techniques and strategies, we are able to give these girls and their families a new future, where they can enjoy their childhood as intact but separated twins."
A Global Effort
Although the surgery itself was extraordinarily complex, Professor Jeelani said bringing together specialists across continents presented challenges of its own.
"The surgical challenges notwithstanding, there were significant logistical challenges as well. This case involved a team split across three continents, helping children from a fourth. This would not have been possible without the unconditional support offered by the Abu Dhabi senior leadership and the Pure Health team, crucially hosting the girls and their parents for all surgeries. It is a beautiful example of how we can produce life-changing outcomes through global collaboration and knowledge-sharing: skill, technology and humanity coming together to defy all odds."
The collaboration extended well beyond the operating room. Doctors and specialists from four countries worked together throughout the girls' treatment, planning the surgeries together, sharing expertise and supporting the family during their months in Abu Dhabi. According to Gemini Untwined, the case demonstrated how advances in medicine can be accelerated when knowledge is shared across borders.
Each successful separation also helps improve care for children born with the same rare condition in the future, Professor Jeelani said.
"While we have completed nine separations of craniopagus twins to date, we continue to constantly refine and improve upon our approach—in particular by combining human expertise with artificial intelligence. Through this, we are making surgeries safer and less invasive, ultimately leading to better results for craniopagus twins while having a wider impact on paediatric surgical practice at large. There were a number of global firsts with this set, delivering an outcome not achieved before."
Among the innovations introduced during Mercy and Goodness's treatment were the Open Book Technique, which uses gravity rather than steel retractors to support the brain during surgery, and mixed-reality technology that enabled surgeons to design skull implants using three-dimensional imaging. According to The Times, artificial intelligence was also used to optimize the placement of silicone skin expanders months before the final separation, allowing enough healthy skin to develop naturally to cover the girls' reconstructed skulls and eliminating the need for skin grafts after surgery.
Speaking to The Times, Professor Jeelani described the operation as a "landmark" case that was "planned and executed with a precision not encountered before," reflecting nearly two decades of experience gained through Gemini Untwined's previous separation surgeries.
For Abu Dhabi's health care leaders, the operation also demonstrated what can be achieved when countries unite behind a common purpose.
His Excellency Mansoor Ibrahim Al Mansoori, chairman of the Department of Health – Abu Dhabi, said:
"This is more than a medical milestone; it is a reflection of Abu Dhabi's unwavering commitment to delivering health care that transforms lives. We are proud to have facilitated this global collaboration and to have hosted it in our city, where world-class talent and cutting-edge innovation come together to deliver hope. This is the UAE at its best—leading with compassion and driven by excellence."
A Childhood Begins
Today, Mercy and Goodness are back home in Nigeria after fully recovering.
For the surgeons, the operation represents years of research, meticulous planning and international collaboration.
For the doctors, engineers, nurses and specialists who devoted months to the girls' care, it demonstrates what modern medicine can accomplish when expertise is shared across borders.
For Mercy and Goodness's parents, it marks the beginning of a future they had hoped their daughters would one day have.
And for Mercy and Goodness, it means something beautifully simple.
For the first 19 months of their lives, they had never known what it was like to be apart.
Now they can begin discovering childhood in ways many children take for granted—playing, learning, exploring and growing into two little girls with futures all their own while sharing a bond that no operation could ever change.
Subscribe to The Bright Story and step into a world of hope, wonder, and humanity at its best. With unlimited access, discover powerful personal journeys, heartwarming family and animal stories, incredible discoveries, and the everyday kindness that makes life brighter.
Comments