A hollow, muscular, pear-shaped organ located in the lower pelvis, posterior to the bladder and anterior to the rectum. It has an estimated length of 5-7 cm, width of 5 cm, and depth of 2.5 cm in its widest part. For non-pregnant women, it weighs approximately 60g. Its function is to receive the ovum from the fallopian tube, provide a place for implantation and nourishment, and give protection for the growing fetus. It is divided into three parts: the body, the isthmus, and the cervix.