The jury in the Lindsay Clancy trial has yet to reach its decision. Clancy is accused killing her three chldren.

A US judge sent jurors back for a final push toward a verdict in Lindsay Clancy's triple murder trial after they deadlocked for a second time, raising the prospect of a mistrial.

Clancy, 36, does not deny strangling her children Cora, five, Dawson, three, and Callan, eight months, but claims she was suffering from postpartum psychosis -- excusing her from criminal responsibility.

Her five-week trial, which was televised and featured more than 80 witnesses, has sparked debate in the United States over maternal mental health.

The jury on indicated to Judge William Sullivan that it had reached a stalemate again on the fifth day of deliberations.