Abortion admissions from American athlete Sanya Richards-Ross have raised a modern-day spectre of sport's bad old days of Eastern bloc steroids and blood doping.
In her book Chasing Grace: What the Quarter Mile Has Taught Me about God and Life, Richards-Ross reveals she had a pregnancy aborted the day before leaving for the 2008 Beijing Olympics, where she won a gold medal in the 4x400m relay and bronze in the individual 400 metres.
In an interview with Sports Illustrated Now, she also claims every female athlete she knows has undergone an abortion.
While there is no suggestion these particular pregnancies and abortions were deliberate, abortion doping is a practice alleged to have been common in East Germany during the 1970s and '80s, confirms former Drug Free Sport NZ boss Graeme Steel.
Research suggests that hormonal and other changes during pregnancy do affect physical performance, with women producing a natural surplus of red blood cells during the first three months, increasing aerobic capacity.