A high risk pregnancy is one in which the mother or fetus has a significantly increased chance of death or disability. High risk pregnancy includes for examples hypertensive disorders in pregnancy, diabetes mellitus with pregnancy, IUGR, bad obstetric history. Adverse fetal outcome includes maternal morbidity and fetal morbidity includes low birth weight, low APGAR score, admission to neonatal ICU, and mortality (fetal death). The aim of this study is to evaluate the clinical usefulness of Doppler analysis of the uterine artery velocimetry waveform as well as the ultrasonagraphic study of placental thickness and maturity as a predictor of adverse fetal outcome.