This study was designed to investigate the effects castor seeds (Ricinus Communis) on the ovary functions and characters of female rabbits. The study conducted on 20 of adult rabbit. Animals divided into four groups, each group 5 animals. Group (I) served as control group and received distilled water only, while group (II) has been set as treated orally with castor oil (0.5 ml\BW for 15 days), group (III) has been treated with1 ml\BW castor oil for 15 days, and the forth group treated with 5 ml\BW twice daily. The second group showed loss of weight, diarrhea, loss stamina, dehydration, histopathologically showed destruction of all layer of ovary and present of necrosis in the cell third  group showed identical clinical sign compared to the group (II) and histopathologically showed necrosis, while forth groups death after 6 day due to high doses.