The US military is considering options for the detention of a transgender soldier who is serving 35 years in prison for turning over secret files to WikiLeaks.

Chelsea Manning has requested hormone therapy, including moving the private to a civilian prison, the Pentagon said today.

The Associated Press today reported that defence officials were trying to transfer Pte Manning, who seeks to live as a woman, to a civilian prison to facilitate that treatment.

"No decision to transfer Private Manning to a civilian detention facility has been made, and any such decision will, of course, properly balance the soldier's medical needs with our obligation to ensure Private Manning remains behind bars," Rear Admiral John Kirby, a Pentagon spokesman, said in a statement.

Defence officials said that one option under consideration was transferring Pte Manning to a civilian prison.             

In April, a US judge ruled that Pte Manning, who had gone by the name Bradley, could legally use the name Chelsea.

Bradley Manning was born as a man but identifies as a woman.

Pte Manning is serving her sentence in all-male detention facilities at the US Disciplinary Barracks at Fort Leavenworth, Kansas.

Last year, Pte Manning was sentenced to 35 years in prison for providing more than 700,000 documents, videos, diplomatic cables and battlefield accounts to WikiLeaks in the biggest breach of classified materials in US history.

Pte Manning has repeatedly stated her desire to live as a woman and has requested hormone replacement therapy in prison.

However, so far Army officials have denied those requests, and said that Pte Manning will continue to be treated as a man despite the name change.