The 36-year-old mother received a uterus from a close family friend last year. Her baby boy was born prematurely but healthy last month, and mother and child are now at home and doing well. The identities of the woman and her husband were not disclosed.

"The baby is fantastic," said Dr. Mats Brannstrom, a professor of obstetrics and gynecology at the University of Gothenburg and Stockholm IVF who led the research and delivered the baby with the help of his wife, a midwife. "But it is even better to see the joy in the parents and how happy he made them."

Brannstrom said it was "still sinking in that we have actually done it."