Saudi doctors reported the world’s first human womb transplant on Thursday but leading fertility experts were quick to question the ethics and success of the operation.

Dr. Wafa Fageeh, who led the surgical team at the King Fahad Hospital in Jeddah, reported the research in the International Journal of Gynaecology and Obstetrics.

He said the technique could be a useful treatment in the future for infertile women without a womb whose only other chance of having children was through surrogacy.