title: Slow fetal heart rate may predict pregnancy outcome in first-trimester threatened abortion.
abstract: Two hundred forty pregnant women presented with first-trimester threatened abortion were examined by transvaginal ultrasound. Women with a slow fetal heart rate of less than 120 beats per minute may eventually be at increased risk for pregnancy loss.
authors.forename: Apichart
authors.initials: A
authors.lastname: Chittacharoen
authors.forename: Yongyoth
authors.initials: Y
authors.lastname: Herabutya
mesh_terms: D000033:Abortion, Threatened / Q000503:physiopathology*; D005260:Female; D006340:Heart Rate, Fetal; D006801:Humans; D011247:Pregnancy; D011256:Pregnancy Outcome; D011261:Pregnancy Trimester, First; D011379:Prognosis