What is an ovarian hyperstimulation syndrome?

Ovarian hyperstimulation syndrome (OHSS) is a complication. It occurs in approximately 25% to 44% of IVF patients. Usually the OHSS clinical course is benign. It declares itself by ovarian enlargement, flatulence, feeling of heaviness and pain in the lower abdomen. Sometimes these symptoms are accompanied by sickness and vomiting. If you have first signs of OHSS, you should consult a doctor, as early treatment prevents the development of grave conditions.