患者25岁，于1999年3月对日因停经53天，腹泻恶心呕吐1天，阴道流血半天，拟“急性胃肠炎”急诊入院。患者孕3产1，末次月经1999年2月1日。入院体检：P86次／分，BP12／8kPa，面色苍白，心肺无异常，下腹略他满，下腹轻压痛，无反跳痛及肌紧张，予补液等对症治疗后无呕吐及腹泻 Patient 25 years old, in March 1999 due to menopause 53 days, diarrhea nausea and vomiting 1 day, vaginal bleeding for a long time, to be “acute gastroenteritis” emergency admission. 3 patients with pregnancy 1, the last menstrual February 1, 1999. Admission physical examination: P86 beats / min, BP12 / 8kPa, pale, no abnormal heart and lungs, lower abdomen slightly over his full, lower abdomen tenderness, no rebound tenderness and muscle tension, to the fluid and other symptomatic treatment without vomiting and diarrhea