Overview

Ovarian hyperstimulation syndrome is an exaggerated response to excess hormones. It usually occurs in women taking injectable hormone medications to stimulate the development of eggs in the ovaries. Ovarian hyperstimulation syndrome (OHSS) causes the ovaries to swell and become painful.

OHSS may occur in women undergoing in vitro fertilization (IVF) or ovulation induction with injectable medications. Less often, OHSS happens during fertility treatments using medications you take by mouth, such as clomiphene.

Treatment depends on the severity of the condition. OHSS may improve on its own in mild cases, while severe cases may require hospitalization and additional treatment.