The purpose of this study was to determine the utility of color duplex Doppler sonography of
the uteroplacental circulation in predicting the outcome of first-trimester gestations. One …

The addition of color Doppler imaging (CDI) to the vaginal probe now enables sonographers
to study more accurately the maternal‐fetal circulation at the early stages of the gestation …

Our aim was to study placental circulation during the first trimester of normal pregnancy. For
this purpose, 108 single pregnancies from 4 to 15 gestational weeks were evaluated …

Color Doppler imaging was employed to assess the uteroplacental circulation in abnormal
first‐trimester gestations. Included in the study were 40 blighted ova, 35 missed abortions …

Characteristic changes of low resistance and high diastolic blood flow velocity were
identified by Doppler studies starting in the early phase of the second trimester. These …

Objective To evaluate in vivo the anatomy and physiology of the normal early uteroplacental
circulation. Design Forty-six women were included, all of whom continued their pregnancy …

The placental circulations of 25 normal and five complicated pregnancies were studied by
color Doppler ultrasonography. Flow velocity waveforms were obtained in all 30 …

Purpose. To determine whether spectral Doppler measurements obtained from bilateral
uterine, arcuate, radial, and spiral arteries in early gestation correlate with adverse …

OBJECTIVE: Our purpose was to establish reference data representative of normal findings
at transvaginal color and spectral Doppler ultrasonographic examination of the …

A crucial event in human development is trophoblast invasion, a process that will enable
chorionic and maternal circulations to develop in a synchronized fashion. Early embryo and …