Creech was found dead inside a diaper box in the attic of her home in October 2007.
Harmony's father, Ronald Earl Creech II, had returned from a 15-month deployment in Iraq and discovered his daughter missing. Harmony was born while he was overseas.
Heuser later admitted she found her daughter dead in her crib and panicked and hid the body.
The medical examiner listed the cause of death as undetermined, but a second expert found chronic starvation and medical neglect were likely contributing factors.
Heuser will spend 11 to 15 years in prison.