Crequat J, Loufrani B, Madelenat P
Presse Med. 1983 May 7;12(20):1265-7.
Incipient ectopic pregnancy is always difficult to diagnose. Hormonal assays confirm pregnancy, but in "high tubal risk" women the site of ovular implantation must be determined as early as possible and this, in theory, can be done by ultrasound examination. However pseudogestational images resembling incipient ectopic pregnancy may be misleading, and in the tubal context ultrasound scans must be interpreted with caution before embryonic echoes can be identified in the amniotic cavity.
早期异位妊娠总是难以诊断。激素检测可确诊妊娠，但对于“输卵管妊娠高危”女性，必须尽早确定胚泡着床部位，理论上这可通过超声检查完成。然而，类似早期异位妊娠的假妊娠图像可能会产生误导，在输卵管情况下，在羊膜腔内识别胚胎回声之前，超声扫描的解读必须谨慎。
