Placental insufficiency or Uteroplacental vascular insufficiency is a complication of pregnancy when the placenta is unable to deliver an adequate supply of nutrients and oxygen to the foetus and thus cannot fully support the developing baby. It may be caused due to preeclampsia. Placental insufficiency can lead to Intra uterine growth retardation (IUGR) .IUGR is defined as estimated birth weight below 10th percentile for gestational age which is quite common. This study aims to evaluate the effectiveness of L-arginine in placental insufficiency