Baby becomes the first UK baby to have surgery performed on him while in his mother's womb to repair gastroschisis.
Maisie Savage was 26 weeks pregnant with baby Theo when doctors performed the surgery.
Gastroschisis is a birth defect where the belly button does not develop properly, and the baby's intestines grow outside of the body.
The operation happened at Texas Children’s Hospital.
Doctors partially exposed Theo's mom's womb before performing keyhole surgery, where they gently put his intestines back in his body.
Theo was carried to term and was born healthy with no scars.
Theo's mom, Maisie, was left with a scar about two times the size of a C-section.