SALT LAKE CITY (AP) _ Five years ago, Bernadine Dugan donated a kidney to her ailing father. This week, her twin sister did the same for their ailing mother.

Bernadette Kuzov, 27, was in stable condition and Olivia Kuzov, 54, was in serious but stable condition early today at University Hospital, where the transplant was performed Tuesday.

The diabetes that destroyed Mrs. Kuzov's kidneys may complicate her recovery, said hospital spokesman John Dwan. But he said the success rate for such operations is high.

Bernadine Dugan donated a kidney to their 61-year-old father, Ed. High blood pressure caused his kidneys to fail.

The parents and Bernadine live in Delta, Colo. Bernadette lives in Vancouver, Wash.