Levi S
J Gynecol Obstet Biol Reprod (Paris). 1976 Apr-May;5(3):359-65.
The embryonic sac has been measured and its dimensions compared with normal measurements in cases where symptoms suggest threatened abortion. This has been done with the object of trying to complete visual exploration of the uterine contents in such cases. The distribution of the diameters that have been measured in 148 pathological cases show that the number of those below the lower limit of normal is significantly higher when pregnancy will result in abortion or in premature labour.
对胚囊进行了测量，并将其尺寸与症状提示有流产先兆的病例中的正常测量值进行了比较。这样做的目的是试图在这类病例中完成对子宫内容物的可视化探查。在148例病理病例中所测量的直径分布表明，当妊娠将导致流产或早产时，低于正常下限的直径数量明显更多。
