HONOLULU -- The family of Sharnell Onaga has announced she died on Tuesday night.

Onaga found out she had leukemia when she became pregnant. She decided to have the child, and refused to undergo chemotherapy.

Onaga had two children and discovered she had leukemia when she was nine weeks pregnant with her third.

The public and media learned about her through bone marrow drives. Though many were tested, doctors never found a match for Onaga. She gave birth on Dec. 4.

"Sarah is 4 months old and just doing wonderfully. She's in perfect health and obviously a very special baby," Onaga family friend Cissy Boyer said.

Onaga hoped for a cord blood transplant, but developed an infection.

"Up to the very end we were all very hopefully, and up to the last breath we were praying for a miracle -- literally that she would be restored and come back. We, really, as a family and friends, wanted her to be here with us, especially because of the type of person she was, but that wasn't God's plan for her," Boyer said.

Onaga encouraged women to save their umbilical cord blood when they give birth, because it can treat people with leukemia.