A regular ultrasound and a Doppler USG are both important diagnostic tools during pregnancy, but they serve different purposes. A regular ultrasound primarily provides images of the fetus, helping doctors assess fetal structure, size, position, and overall growth. It is commonly used for routine pregnancy checkups and anomaly scans. However, it does not evaluate blood flow or oxygen supply to the baby. In contrast, a Doppler USG focuses specifically on measuring blood circulation in the umbilical cord, placenta, and fetal blood vessels. This makes it especially important in high-risk cases, such as twin pregnancy, where monitoring blood flow is critical for ensuring proper fetal growth. While a standard ultrasound confirms development milestones, a Doppler USG provides deeper insight into whether the baby is receiving adequate oxygen and nutrients, helping doctors detect complications like growth restriction or placental insufficiency at an early stage.