The uterus, also known as the womb, is a major reproductive organ in the female body. It is responsible for the growth and development of the fetus during pregnancy. The uterus is a hollow, pear-shaped organ located in the lower abdomen between the hip bones. It is made up of muscle and other tissues and has three layers: the endometrium, myometrium, and serosa. The endometrium is the inner layer of the uterus that lines the cavity and is where the fertilized egg implants and develops. The myometrium is the thick middle layer of muscle that allows the uterus to expand during pregnancy. The serosa is the outer layer of the uterus that is made of connective tissue. The uterus plays an essential role in fertility and childbirth. It is where the fertilized egg implants and grows during pregnancy. During labor, the contractions of the uterus help to push the baby out. The uterus also produces hormones, such as estrogen and progesterone, which help to regulate the menstrual cycle and prepare the uterus for pregnancy. The uterus is also important for health and wellbeing. Abnormalities in the uterus, such as fibroids or endometriosis, can cause pain and other symptoms.