Last years, feasibility and possible interest of uterine artery Doppler during the third month of gestation were confirmed. Doppler flow velocity waveforms can be obtained and assessed in both uterine arteries using abdominal ultrasonography at 12-14 weeks' gestation. The no notch group (one third of women) has a low risk for hypertension, intra-uterine growth restriction, abruptio placentae. The "protecting" effect of the absence of uterine artery notch is as high as this physiological change occurs earlier.