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Journal of Medical Ultrasonics

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1988 - Vol.15

Vol.15 No.03

Original Article(原著)

(0250 - 0255)

妊娠 5, 6, 7 週で電子スキャンによる心拍動を確認した例の胎芽死亡の検討

The Study on the Time of Intrauterine Embryonic Deaths before 10 Weeks of Gestation by Real-time Ultrasonic Scanning: The Outcome of Embryos Whose Heart Beats are Visible between 5 and 7 Weeks of Gestation

加藤 達夫1, 後藤 濬二2

Tatsuo KATO1, Shunji GOTO2

1加藤産婦人科病院, 2国立名古屋病院産婦人科

1Kato Hospital, 2Department of Obstetrics and Gynecology, Nagoya National Hospital

キーワード : Ultrasonography, Embryonic death, Abortion

We report embryonic outcome in 1015 cases of heart beat visible in 5 to 7 weeks of gestation. None of the 21 cases with a visible heart beat at 5 weeks died. Of the fifteen embryos that died before 10 weeks (15/1015, 1.48%), 4 showed a heart beat at 6 weeks, out of a total of 265 cases (1.5094%); and 11 at 7 weeks, out of a total of 729 cases (1.5089%). Thus, the rate of death was the same in each week.
A linear relationship was seen between the times of these deaths as calculated by the ultrasonographic (US) size and the lengths of embryonic life at the first detection of a heart beat, as calculated by US size and the last menstrual period.
We concluded that:
1) In cases of embryonic death after appearance of the heart beat, various degrees of retardation of growing embryos begins from seven weeks of gestation;
2) These embryonic deaths occur around the beginning of nine weeks of gestation, and a variety of retardations of US size was seen;
3) In cases where no heart beat at all is visible, embryonic death occurs before six weeks of gestation.