Racine County Circuit Judge Wayne Marik sentenced 44-year-old Sandra Joncas today following a hearing that lasted most of the day.
Joncas earlier pleaded no contest to second-degree murder and failing to report the death of a child in an agreement with prosecutors.
Joncas was formerly known as Melnik until her divorce following the crime.
The woman is accused of stabbing her baby as she gave birth in her home on April 22, 2001, then tossing the body in a garbage bag.
The baby had stab wounds to the head and abdomen. Joncas had stab wounds to her genitals.
Joncas had faced up to 47 years in prison and 23 years of extended supervision.