Cervical pregnancy is a rare variety of ectopic pregnancy. The success of conservative treatment for cervical pregnancy depends on early and accurate diagnosis of ultrasound. We found Contrast-enhanced ultrasonography (CEUS) to be an accurate diagnosis approach for cervical pregnancy. In cervical pregnancy, CEUS showed rapid enhancement of the wall of the gestational sac during the early enhancement phase with the performance of hyper-enhanced. Enhancement sustained at a high level of intensity through the early enhancement phase, with the sign of doughnut-shaped in the wall of the gestational sac, and washed out slowly during the late enhancement phase. While the wall of the gestational sac showed no enhancement during the whole phase in aborting intrauterine pregnancy residing in the cervical canal.