1资料与方法1.1一般资料患者女,26岁,孕1产0,因停经7w来我院早孕常规检查,妇检:子宫增大如孕周,尿HCG(+),血β-HCG:68000μm/L,阴道超声提示:单孕囊,孕周与末次月经相符,羊膜囊内见两个胚芽,长度均为10mm,均见心搏,嘱随诊,孕19w3d门诊复查,多普勒仅闻及一胎心音,遂行三维超声检查,发现胎儿A心率150次/min,胎儿B未见心搏,诊 1 Materials and Methods 1.1 General Information Female patients, 26 years old, 1 pregnant and 0 due to menopause 7w to our hospital routine examination of early pregnancy, gynecological examination: uterine enlargement such as gestational age, urinary HCG (+), blood β-HCG: 68000μm / L, vaginal ultrasound Tip: single gestational sac, gestational age consistent with the last menstrual period, the amniotic sac see two germs, the length of both 10mm, were see beats, ask follow-up, pregnancy 19w3d outpatient review, Doppler only heard And a fetal heart sound, conducted three-dimensional ultrasound and found that the fetus A heart rate 150 beats / min, fetus B no heartbeat, diagnosis