This soft, lifelike plastic model (15½" x 10¼" x 4") of the external female genitalia includes a set of six interchangeable cervix simulations. Allows users to practice measuring the cervix prior to birth. Included cervices show no dilation, 2-cm dilation with 50% effacement, and 2-cm, 5-cm, 7-cm, and 9-cm dilation with full effacement. Comes with instructions and carrying case. Perfect for student training.