A condition in which the fetus doesn’t grow as big as it should while in the uterus. These babies are small for their gestational age, and their birth weight is below the 10th percentile. IUGR can be caused by decreased blood flow to the placenta, maternal hypertension, drug use, smoking, poor weight gain, dieting during pregnancy, pre-eclampsia, alcoholism, multiple fetuses, abnormalities of the cord or placenta, prolonged pregnancy, chromosomal abnormalities, or a small placenta.