The federal government, continuing its string of executions this year, has set the dates for two more, including the first woman in more than six decades.
Lisa Montgomery is expected to receive lethal injection on December 8, the Justice Department says. Prosecutors said she used a kitchen knife to remove Stinnett's baby from her womb.
Montgomery strangled and killed Bobbie Jo Stinnett, who was 8 months pregnant, in 2004.
The Trump administration resumed executions of federal inmates earlier this summer for the first time in almost two decades.
Montgomery's lawyers argued that she had been suffering from delusions when she killed Ms Stinnett, but a jury rejected her defence.
Her lawyers also argued that she was suffering from pseudocyesis, which causes a woman to falsely believe she is pregnant and exhibit outward signs of pregnancy.
In 2007, a US District Court for the Western District of Missouri sentenced Montgomery to death after finding her guilty of a federal kidnapping resulting in death.
Kelley Henry, Montgomery's attorney, said that her client shouldn't be executed as she is mentally ill and a survivor of child abuse.
The justice department on Friday also scheduled a December 10. execution for Brandon Bernard, who with his accomplices murdered two youth ministers in 1999.
The new protocol revived long-running legal challenges to lethal injections. "But her severe mental illness and the devastating impacts of her childhood trauma make executing her a profound injustice", Henry claimed. Vialva pulled out a gun, forced the couple into the boot of the auto and drove around for several hours, stopping at ATMs to withdraw cash and attempting to pawn the woman's wedding ring, according to prosecutors.
Both Montgomery and Bernard are held at the federal prison in Terre Haute, Indiana.
The Trump administration wrapped up an informal 17-year-hiatus on federal executions in July, when white supremacist Daniel Lewis Lee convicted of killing a family of three, received a lethal injection.
Before this year, the federal government had not executed anyone since 2003, and just four people since the 1960, Bureau of Prisons records show.
"This evidence confirms that Mr. Bernard is simply not one of the "worst of the worst" offenders for whom we reserve the death penalty, and that sparing his life would pose no risk to anyone", Owen said.