[Reliability of dopplerophony in the first trimester of pregnancy (author's transl)].
D005188:False Negative Reactions; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D014465:Ultrasonics
Spolehlivost dopplerofonie v prvním trimestru gravidity