Sanya Richards-Ross says she "absolutely" has regrets over her 2008 abortion -- which she had right before competing in the Beijing Olympics -- explaining, "It breaks my heart to think about it."
We spoke with the U.S. Olympic track star about the bombshell revelation she made in her new book "Chasing Grace" ... and she shed more light into the decision to terminate her pregnancy.
"I felt like it was a choice I had to make in order to continue pursuing my dream," Sanya said.
Sanya -- who's currently pregnant -- also says the decision "still weighs very heavily on my heart.