Conventional surgical methods for treatment of invasive cervical cancer inevitably lead to castration. In young women premature cessation of ovarian function may lead to serious short term and long term complications. The preservation of ovarian function if possible is crucial to improving quality of life. 48 patients with Ia and Ib carcinoma of the cervix entered this study. All patients were treated by Wertheim's radical hysterectomy with ovarian transposition. Some of them had adjuvant radiotherapy. It appears that radical surgery even with postoperative brachytherapy has not had adverse effect on ovarian function. It has been found that depletion of ovarian function might be expected in patients treated by external beam irradiation if the distance between the upper margin of the inlet field and the transposed ovary was less than 3 cm. In 91% cases, in USG examinations distinct reduction of transposed ovary echostructure were found.