Jouppila P, Piironinen O
Obstet Gynecol. 1975 Nov;46(5):616-20.
Ultrasound methods for detecting fetal life during early pregnancy are reviewed. By using recently developed techniques, fetal heart function can be detected as early as the 44th to 45th day of amenorrhea. Fetal movements in the amniotic cavity can be visualized from the 10th week on. If no signs of fetal life can be detected by ultrasound examination by the 10th week, the pregnancy is in jeopardy. However, the prognosis is favorable in over 90% of those cases of threatened abortion in which fetal life has been confirmed by ultrasound.
本文综述了早期妊娠期间检测胎儿生命体征的超声方法。通过使用最近开发的技术，早在闭经第44至45天就能检测到胎儿心脏功能。从第10周开始就能观察到羊膜腔内的胎儿活动。如果在第10周通过超声检查仍未检测到胎儿生命体征，则妊娠处于危险之中。然而，在那些经超声确认有胎儿生命体征的先兆流产病例中，超过90%的预后良好。
