The empty amnion: a sign of early pregnancy failure.

摘要: Between 6.5 to 10 weeks of gestation, the length amniotic cavity is similar that embryo. It follows by time an sac detectable sonographically, embryo equal should also be visualized. Retrospective review case records at our institution revealed 15 patients in whom amnion was visualized absence embryonic pole during first trimester sonography (endovaginal and transvesical). Indications for sonographic examination included gestational age estimation, discrepant size dates, or vaginal bleeding. The mean diameter gestations ranged from 14 36 mm, corresponding ages 6.1 9.5 weeks. Ages based on last menstrual period 11 A yolk identified all cases addition sac, but neither nor cardiac pulsations were observed. In 12 greater than 16 such met accepted criterion a failed pregnancy. Follow-up confirmed early pregnancy failure. this series demonstration "empty amnion" (visualization no identifiable pole) always associated with loss. sign helpful as additional finding confirming