A baby girl born in Hong Kong was found to be 'pregnant' with twins.
The girl who was born to Chinese mainland parents had to undergo surgery at just three weeks old to remove them, UK Mirror reports.
The foetuses had legs, arms, a spine, rib cage, intestines and were also covered in skin. One weighed 14.2 grams while the other 9.3 grams; each had an umbilical cord.
Fortunately, the surgery was successful and the girl left the hospital eight days later.
According to Dr Yu Kai-man, a specialist in obstetrics and gyneacology, it is the first documented case in the city.
"It was almost impossible to detect during the prenatal check-up, as the embryo inside the baby was too small.
"Since it is impossible for the little girl to have conceived the pregnancy on her own, the fertilisation of the twin fetuses, of course, belongs to her parents, which has gone to the wrong place."
It would be added that the reason for the abnormality, which happened to a little baby born in 2010, is still unknown. But the World Health Organisation classified it as a type of cancer.