1病例报告患者女,32岁。孕3产1。因超声检查提示胎儿骶尾部肿物2天入院。既往有剖宫产史;平素月经规律;停经35天曾口服去氧孕烯炔雌醇片2粒,否认其他药物、毒物、放射线等接触史,否认高热、流感、风疹、荨麻疹等疾病病史;停经44天无诱因出现少量阴道血性分泌物,不伴腹痛,超声检查提示宫内早期妊娠,胎心(+)。口服黄体酮0.2g/次,每天1次,连服29天后停 A case report patient female, 32 years old. Pregnancy 3 production 1. Ultrasound examination prompted sacrococcygeal mass 2 days admission. Past history of cesarean section; usually menstrual regularity; Menopause 35 days had oral administration of two or three ethinyl estradiol tablets, denied contact with other drugs, poisons, radiation exposure history, denied fever, flu, rubella, urticaria and other diseases history ; Menopause 44 days no incentive causes a small amount of vaginal bloody discharge, without abdominal pain, ultrasound showed intrauterine early pregnancy, fetal heart rate (+). Oral progesterone 0.2g / time, 1 day, even for 29 days after stopping