The uterus is about 7 to 8 cm deep and has a capacity of about 5 ml. During pregnancy the uterus can reach a depth of 35 cm and its capacity can increase to 5000 ml. The uterus is the organ that nurtures the embryo, fetus and produces menstruation. In non-pregnancy, the uterus is about the size of your own fist. It is about 7-8 cm deep, 4-5 cm wide and 2-3 cm thick.The uterus can be divided into two parts: the body of the uterus and the cervix. In adult women, the body of the uterus is larger and the cervix is smaller, in a ratio of about 2:1. The uterus undergoes a great deal of change while carrying a fetus. The uterus enlarges as the fibers of the uterine muscle elongate. The uterus reaches a depth of about 35cm, a width of 25cm, a thickness of 22cm, and a volume of 5000 ml. All these changes are for the better nurturing of the fetus. At 42 days after delivery, the uterus will gradually return to its non-pregnant state.