A Swedish woman has been charged with possession of human skulls and bones, which the prosecution claimed she used for sexual purposes.

The 37-year-old woman kept at least six skulls, one spine and "a large number of other bones" in her Gothenburg apartment, according to the prosecution's charge sheet.

It said she had used the human body parts "for various sexual activities". The evidence included two CDs entitled "My necrophilia" and "My first experience".

Pictures from a morgue, also included in the evidence, were found in a secret compartment in the woman's home, along with a drill and body bags.

However, police had found no proof that she had been involved in digging up graves, said news agency TT.

The woman was arrested in September and was charged on Tuesday at Gothenburg's district court with "violating the peace of the dead", which in Sweden is a crime punishable by up to two years in jail.

She has admitted to keeping the items in her apartment but has denied any wrongdoing, a spokeswoman for the prosecution said.

"During the summer of 2012 [she] sold three skulls and a spine ... to a person in Uppsala," the prosecutor said in the indictment.

"My morals set my limits and I'm prepared to take the punishment if something should happen. It's worth it," the woman wrote in a post on an internet forum a few years ago, according to daily newspaper Goeteborgsposten.

"I want my man like he is, whether he is dead or alive. He allows me to find sexual happiness on the side," added the woman, who has said she is in a relationship.

The access code to a morgue was also found in the apartment, the paper said, citing a press conference held by the prosecutor on Tuesday.

A preliminary court-ordered psychiatric evaluation found the woman to be legally sane.

AFP