病例:孕妇25岁,主因停经87天,下腹痛2天入院。平素月经不规律,停经34天自测尿HCG(+),停经后无早孕反应及其它不适,近两天腹痛,无阴道出血及用药治疗,急来我院就诊。超声检查:子宫大小64 mm×55 mm×34mm,肌层回声均匀,内膜厚10mm,只探及一侧宫角回声,宫腔内未见明显妊娠囊回声,双测卵巢未探及。宫体右上方可见一胎儿回声:胎儿双顶径31mm,头围111mm,腹围95mm,股骨长 Case: pregnant women 25 years old, mainly due to menopause 87 days, abdominal pain 2 days admitted. Irregular menstruation irregularities, 34 days after menopause self-test urine HCG (+), menopause no early pregnancy reaction and other discomfort, abdominal pain for the past two days, no vaginal bleeding and medication, urgent medical treatment. Ultrasonography: uterine size 64 mm × 55 mm × 34mm, myometrial echo uniformity, endometrial thickness 10mm, only to explore the side of the horn echo, intrauterine cyst echo no obvious gestational sac, double test ovary not explored. The upper right side of the Palace can be seen a fetus echo: fetal biparietal diameter 31mm, head circumference 111mm, abdominal circumference 95mm, femur length