患者21岁。因孕18周+1,阴道流液20d,同房后阴道流血11d,于2006年12月14日入院。患者平素月经规律,LMP2006年8月9日。20d前无明显诱因出现阴道流液,无色,量多,有臭味,无腹痛,未就诊。11d前同房后出现阴道流鲜血,量约2mL,无腹痛,于当地医院就诊,以“先兆流产”予保胎治疗8d,其间 The patient is 21 years old. 18 weeks because of pregnancy +1, vaginal fluid 20d, vaginal bleeding after the same room 11d, on December 14, 2006 admission. Patients usually menstrual regularity, LMP August 9, 2006. There was no obvious predisposing vaginal fluid before 20d, no color, quantity, smell, no abdominal pain, no treatment. 11d before the same room after the emergence of vaginal blood flow, the amount of about 2mL, no abdominal pain, at a local hospital for treatment of “threatened abortion” to protect the fetus 8d during which