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Abstract To analyze the value of transabdomen ultrasound (TAS) and transvaginal ultrasonography (TVS) for diagnosing cervical ectopic pregnancy. Methods: 80 patients with suspected cervical ectopic pregnancy were selected for analysis, among which, 26 women were examinated by TAS alone, 28 women were examinated by TVS alone, and 26 women were examinated by TAS combined with TVS. The pathological examination result was as the gold standard of diagnosis, the effect of diagnosing cervical ectopic pregnancy and the characteristics of misdiagnosis and missed diagnosis were compared between TAS and TVS. Results: TAS combined with TVS had the highest detection rate (90.9%), followed by TVS (76.0%), and TAS had the lowest detection rate (65.2%). The missed diagnosis of TAS was associated with insufficient display of liquid dark area in uterine and rectal lacunae, and low display rate of fluid dark area in intraabdominal mobility. The missed diagnosis and misdiagnosis of TVS were mainly caused by patients with peritoneal effusion or by inadequate estimated blood loss in patients with ruptured ectopic pregnancy. ROC curve analysis showed that the area under the ROC curve of TAS combined with TVS, TAS alone, or TVS alon for diagnosing cervical ectopic pregnancy were 0.778, 0.648 and 0.611, respectively. Conclusion：TVS combined with TAS for diagnosing cervical ectopic pregnancy has high accuracy rate, which can decrease the rate of missed diagnosis, and can provide fast and accurate data for supporting clinical practice.
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