A Spanish woman who deceived a US fertility clinic about her age and become the oldest woman to give birth has died at 69, leaving behind two-year-old twins, newspapers reported on Wednesday.

Maria del Carmen Bousada gave birth in December 2006 after telling a clinic in Los Angeles that she was 55, the facility's maximum age for single women receiving in-vitro fertilisation.

Guinness World Records said the 66-year-old was the oldest woman on record to give birth and the case ignited fierce debate over how much responsibility fertility clinics have over their patients.

Bousada told an interviewer at the time that the Pacific Fertility Centre did not ask her for identification. She maintained that, because her mother had died at 101, she stood a good chance of living long enough to raise her children.

Dr Vicken Sahakian, director and owner of the clinic, said Bousada falsified her birth date on documents from Spain.