Fertility and sterility
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Fertility and sterility · Aug 1991
Reliability of transvaginal ultrasound in detecting first trimester pregnancy abnormalities.
To evaluate the reliability of transvaginal ultrasound (US) and human chorionic gonadotropin (hCG) levels in detecting early abnormalities and predicting outcome of pregnancy. ⋯ A fetal crown-rump length compatible with gestational age and fetal heart motion seen by transvaginal US can predict a term pregnancy in greater than 90% of patients.