Correlation Between Umbilical Resistance Index and Fetal Growth

Inclusion Criteria: * Any pregnant patient with a normally progressing pregnancy and reporting for a prenatal screening ultrasound between 31 and 34 weeks amenorrhea. Exclusion Criteria: * -The lack of an ultrasound carried out during the first trimester to confirm the term of the pregnancy. * A medical condition in the mother: diabetes, high blood pressure or a known chronic illness. * A medical condition in the fetus: suspicion of fetal hypotrophy (fetal biometrics lower than the 10th percentile), a birth defect (a chromosomal abnormality) during the pregnancy. * Patients with tobacco addiction. * A body mass index (BMI) ≥ 30 before the pregnancy. * Multiple pregnancies * A gap of less than 4 weeks between the date of the ultrasound and the date of delivery.