Australia's three-time butterfly world champion Jessicah Schipper was Thursday recovering after emergency surgery on an ovarian cyst, just months from the London Olympics.
The 25-year-old butterfly star is expected to spend the next fortnight out of the water after being rushed to hospital complaining of severe abdominal pain.
"Ended up having a cyst that was bleeding. All fixed now. Just very tired and sore," tweeted Schipper, who won bronze medals in the 100m and 200m butterfly at the 2008 Beijing Olympics.
Swimming Australia said it was unlikely to affect her tilt at a third Olympic Games and reports said she still hoped to travel to the United States later this month to join her training squad.
Schipper has a total of five world championships gold medals and relay golds from the 2004 and 2008 Olympics.