The growth of the baby is monitored between 28–38 weeks. At this time, the fetal head, abdomen and femur are measured and plotted on a graph to assess the growth. During the scan, a detailed evaluation of all the organs and limbs may be difficult due to fetal position and relatively less space around the baby. In some situations, a Doppler may be indicated to study blood flow from the matter to the baby. The ammunition fluid level is also mentioned during this period.