Lisa Montgomery, the only woman on federal death row , was granted a last-minute stay of execution on Monday night, less than 24 hours before she was scheduled to be put to death.

U.S. Judge James Patrick Hanlon from Indiana blocked the execution to allow the court to conduct a hearing to determine whether Montgomery is competent to be executed.

Lawyers argue that Montgomery, who has been diagnosed with several mental disorders, is in a state of psychosis. She has reported having auditory hallucinations and religious delusions in recent days, her lawyers said in a court filing, and is unsure what is real and what is not. The Eighth Amendment prohibits executing an individual who cannot reach a rational understanding of the reason for his or her execution.

The court will set a date for an evidentiary hearing in due course, Hanlon wrote. The government is appealing the stay.

Montgomery has been diagnosed with bipolar disorder with psychotic features and complex post-traumatic stress disorder. She was a victim of severe childhood abuse , including incest and sex trafficking by her own parents, as HuffPost has previously reported. Mental health experts who have evaluated Montgomery believe she developed an extreme dissociative disorder as a way of coping with the sexual and physical violence of her childhood.

She has been under constant psychiatric care since her 2004 arrest for the murder of Bobbie Jo Stinnett, who was pregnant. Montgomery strangled Stinnett and cut open her abdomen to remove the baby, which she pretended was her own child.

Fetal abduction, as the crime is called, occurs extremely rarely in the U.S. and is primarily perpetrated by women with documented mental health conditions.