Abstract: To follow this study 56 mature female rats were used, thirty days before test stars all animals separated from male rats. All rats synchronized by vaginal smir on estrus phase of menstrual cycle. Animals were kept in 7 cages with 8 rats in each, are rarred at 22�2�C temperature and 12/12light/dark conditions. The rats were divided to two treatment and control groups. On days 8, 14, 21, 30, 60 after ligation of right ovarian artery by laparatomy, all rats were scarified and ovaries were collected. histological studies did on the ovaries. Observation demonstrated that the ovary on the ligated side has significantly fewer ovulations (p 0.01) than the ovary in the normal condition in the intact side. Observations also demonstrated cystic follicles on removed ovary (right ovary), but no polycystic follicles observed on the intact side ovaries. However, there was no corpus luteum on the removed ovary. There were no corpora albicantia observed indicating there had been no recent ovulation. But no abnormality detected on left ovary.