Importance of Scanning During Pregnancy - Why is so important to get the Early Scan done, Between 6 to 8 Weeks is the early scan done that the usually to the dating for the viability and the location of Pregnancy. 1) This is very important to know whether the pregnancy is in the Uterus or the outside the Uterus. 2) Viability of the scan of the Fetus which is done to know what kind of gestational age of the Fetus