Endovaginal sonography in very early pregnancy: new observations.
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Goldstein
D005260:Female; D005313:Fetal Death; D005318:Fetal Heart / Q000503:physiopathology*; D005333:Fetus / Q000033:anatomy & histology*; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D014463:Ultrasonography