Ovarian Dermoid Cyst Introduction: Ovarian disease are common in animal affecting fertility and health. Most of the ovarian tumors arises from the surface epithelium of the ovary know as epithelial ovarian tumor. Some tumor arise from the germ cells inside the ovary they are called germ cell tumors. Less commonly ovarian tumor arises from cells surrounding germ cells or other stromal cells namely sex cord stromal tumors. During normal pregnancy when germ cells is fertilized by sperm they will produce zygote forming one cell. This cells will divide and multiply forming large no of cells. few days later apart of these cells gets rearranged into ectoderm , endoderm and mesoderm these layer will form all living tissue. Ectoderm form skin epidermis, hair and nervous system. Mesoderm form bone, muscle, cartilage and connective tissue. Endoderm form stomach, intestine, colon, liver pancreas and bladder. Ovarian dermoid cyst is germ cell tumor that arises from single germ cell it is al