Goldstein S R, Subramanyam B R, Raghavendra B N, Horii S C, Hilton S
AJR Am J Roentgenol. 1983 Nov;141(5):975-8. doi: 10.2214/ajr.141.5.975.
Fifty-six patients with clinical threatened abortion were evaluated by sonography. In six patients, fetal cardiac activity was absent at or beyond 9 weeks of gestation, and fetal death was confirmed in all six cases. In the other 50 patients, fetal cardiac activity was present at or beyond 9 weeks of gestation. In 10 (20%) of these 50 patients, subchorionic bleeding was present in various degrees, appearing sonographically as an extrachorionic crescentic anechoic or complex collection. The final outcome in the 50 patients with fetal cardiac activity was as follows: In the absence of subchorionic bleeding, 100% of the pregnancies progressed to term; in the presence of subchorionic bleeding the positive outcome was reduced to 80%. In addition to signs of fetal life on sonography, subchorionic bleeding is an important factor affecting the outcome of gestations in patients with clinical threatened abortion.
对56例临床诊断为先兆流产的患者进行了超声检查。6例患者在妊娠9周及以后未检测到胎心活动，所有6例均确诊为胎儿死亡。其他50例患者在妊娠9周及以后检测到胎心活动。在这50例患者中，10例（20%）有不同程度的绒毛膜下出血，超声表现为绒毛膜外新月形无回声或混合性液性暗区。50例有胎心活动患者的最终结局如下：无绒毛膜下出血时，100%的妊娠可至足月；有绒毛膜下出血时，阳性结局降至80%。除超声检查显示有胎儿存活迹象外，绒毛膜下出血是影响临床诊断为先兆流产患者妊娠结局的重要因素。
