Life Lynn DeKlyen died Wednesday evening at the University of Michigan Hospital in Ann Arbor, her aunt Sonya Nelson said.
Life's mother, Carrie DeKlyen, died Sept. 9, just three days after giving birth to her sixth child.
The family posted about the tragedy to their Facebook page Thursday morning, saying, "It is with great sadness and a absolutely broken heart that I tell you Life Lynn passed away last night. Carrie is now rocking her baby girl. I have no explanation of why this happened, but I do know Jesus loves us and someday we will know why. The grief we feel is almost unbearable, please be praying for our family."