Pregnancy ultrasound uses sound waves to create images of the developing baby in the womb. Different scans are done at different stages of pregnancy to check baby's growth, position, heartbeat, and detect any abnormalities.
Key pregnancy scans include dating scan (6-8 weeks), NT scan (11-14 weeks), anomaly scan (18-22 weeks), and growth scans (28-36 weeks). Each serves a specific purpose in monitoring the pregnancy.