[Course of mole pregnancy complicated by ovarian hyperstimulation syndrome].

Ovarian hyperstimulation syndrome (OHSS) is usually an iatrogenic condition caused by ovulation induction. Spontaneous OHSS is rare. We present a case of OHSS after dilatation and curettage of a triploid partial mole. In the case symptoms of OHSS developed after the abortion when serum human chorionic gonadotropin values were declining. Noticeable was also an affected androgen metabolism and a high level of cancer antigen-125. It is important to be aware of the OHSS diagnosis in order to avoid unnecessary surgery due to suspected ovarian malignancy. The treatment of OHSS is supportive with intravenous fluid and thrombosis prophylaxis.