Cori announced the news Saturday afternoon ... sharing a black-and-white photo where she's grinning and lovingly holding Codi in her arms.
She writes that Codi -- the "love of her life" -- passed away Monday ... adding an angel wing emoji to the post.
Codi was born three months premature, Cori revealed in February of last year ... and Codi most of the next 10 months in the neonatal intensive care unit or NICU.
However, just three weeks ago, Cori shared a photo of her and Codi at relaxing in bed together ... telling her followers God heard all their prayers.
Codi's father, Wayne Deuce, also shared a heartfelt tribute to his daughter ... writing on social media that he will always be with her.
