Nayembi, who was born in November, suffered a severe facial cut while momentarily out of view at the zoo in February, the Chicago Tribune reported.
The baby gorilla underwent emergency surgery and has been under round-the-clock care since then, Lincoln Park Zoo spokeswoman Sharon Dewar said.
She was reunited with her mother, Rollie, and another baby gorilla about a month ago, and her father, Kwan, Wednesday, Dewar said.
Now, "we're ready for the next step," Dewar said.
Zoo visitors will be able to see Nayembi starting at 1 p.m. Thursday.
"It's really exciting," Dewar said.