A teenager is demanding €3million (£2.5million) in compensation after learning she was swapped at birth with another baby almost 20 years ago.
The now 19-year-old was switched in a maternity ward at a hospital in the La Rioja region of Spain in 2002.
The mix-up came to light by chance after one of the women took a DNA test and discovered she was not genetically related to her presumed mother and father.
It happened after she and another baby were both born underweight and placed in incubators, before being handed to the wrong parents.
Spanish medics have blamed the incident on “human error”.
The 19-year-old is now taking legal action against local health authorities.
Sara Alba, health chief of Spain’s northern La Rioja region, told a news conference: “It was a human error and we haven’t been able to find out who was to blame.