目的：为了探讨未破损期异位妊娠与宫内早孕合并附件包块（Ｂ超宫内、宫外均未探及明显胚芽及胎心搏动）的Ｂ超鉴别诊断。方法：对５３例未破损期异位妊娠与５９例宫内早孕合并附件包块，患者的Ｂ超特征进行回顾性比较研究。结果：两组间子宫增大出现率、宫内膜厚度及子宫直肠窝液暗出现率间差异有显著性（Ｐ＜００１），而两组间宫外包块直径的差异无统计学意义（Ｐ＞００５）。结论：Ｂ超探查宫内膜厚度、宫内回声情况、子宫增大情况、宫外包块特征及子宫直肠窝液暗区对两组疾病的鉴别具有特异性 OBJECTIVE: To investigate the differential diagnosis of B-ultrasound in undamaged ectopic pregnancy and intrauterine early pregnancy complicated with annexes (B intrauterine and extrauterine were not detected and obvious germ and fetal heart beat). Methods: A retrospective comparative study was conducted on the characteristics of B-ultrasound in 53 cases of undamaged ectopic pregnancy and 59 cases of intrauterine early pregnancy complicated with annex mass. Results: There was a significant difference between the two groups in the incidence of uterine enlargement, the thickness of endometrium and the appearance of uterine rectal fossa (P <001), but there was no significant difference in the diameter of uterine mass between the two groups (P> 005). CONCLUSION: The specificity of B-mode ultrasonography in detecting endometrial thickness, intrauterine echogenicity, uterine enlargement, extrauterine mass and uterine rectum fossa dark area is specific