In my experience as an elite athlete, I did not know any athlete who had an abortion. That doesn't mean it didn't happen, just that I was unaware of it. Also, most distance runners I knew were on the pill. In addition to avoiding pregnancy, it also allowed them to time their periods and avoid that happening during major events.
I am not going to judge Sanya, as I believe people need to make their own decision. It is not a decision I could have made. I think it is very brave of her to speak out now. She could have kept this secret and had no reason to tell her story now. I choose to believe her explanation as to why she is sharing her story now, and hope that it will be helpful to other female athletes to hear it, and hope it will be healing for her having shared this information.
Among the elite women runners that I know, there are several who were actually several months pregnant before they even realized it. These were mostly distance runners who weren't having periods who didn't even consider that any symptoms were due to pregnancy because they were not menstruating. Others, most recently Sarah Brown, found that they were pregnant at an "inopportune" time, and put their running career on a temporary hold.
Best wishes to you, Sanya, with your pregnancy now. I hope that you will enjoy motherhood as much as I have.