Robert Irwin is speaking up for one of his flock.

Three weeks after his sister Bindi Irwin shared she is “genuinely healing” after “13 years of fighting” a health battle with endometriosis, the 21-year-old son of Steve Irwin and Terri Irwin gave an update on how she is feeling.

“She’s doing good,” Robert exclusively told E! News Sept. 3 after his fellow Dancing With the Stars season 34 cast members were revealed. “It's an ongoing battle. Endometriosis is one of these things where it's not a quick fix.”

Indeed, Bindi has undergone multiple surgeries to remove lesions and an ovarian cyst in the two years since she shared her diagnosis with endometriosis, which is caused by unusual tissue growing outside of the uterus.

“It is something that nee

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