Eight patients with a polycystic ovarial syndrome diagnosed endoscopically and endocrinologically were treated by laser incision of the ovaries via laparoscopy. The eight patients were preoperatively Clomiphen-refractory. After the incision, in every case spontaneous menstrual bleeding could be observed. Also in five women ovulation occurred, whilst in three cases, ovulation induction by Clomiphen was carried out successfully. Nevertheless these three patients were immediately after Clomiphen-refractory again. The observation period of the other five patients varied between 4 and 6 months. During this time an ovulation could be confirmed in all of them using basal temperature measurements. Pregnancy has not occurred in any to the present date.