Glossary term
OHSS
Reference only — not medical advice. See disclaimer.
Ovarian Hyperstimulation Syndrome (OHSS) is a potentially serious complication of fertility treatment in which the ovaries over-respond to stimulation drugs, becoming enlarged and leaking fluid into the abdomen. Mild cases are managed conservatively with rest and hydration, whilst severe cases can cause significant fluid accumulation, reduced kidney function, and blood clots, requiring hospitalisation.