[Diagnostic value of ultrasound in early pregnancy (author's transl)].
D005189:False Positive Reactions; D005260:Female; D005318:Fetal Heart / Q000502:physiology; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D013997:Time Factors; D014463:Ultrasonography
Diagnostický význam ultrazvuku v rané graviditĕ.