Hi, level one  in 12 wks. Anomaly scan is in 19th wk of pregnancy. Some told as 3d or 4d. If its more than 28th week then its doppler test to know blood flow to the pregnancy.

Hello, Anomaly scan is usuaully done in 19th week of pregnancy. If pregnancy is in 28th week or more, doppler flow study, a noninvasive test that can be used to estimate the blood flow through your blood vessels by bouncing high-frequency sound waves (ultrasound) off circulating red blood cells.

Hello....... anomaly scan, also known as a mid-pregnancy scan, anamoly scan is routine scan which is done in mid pregnancy, which is done to know growth of baby but now a days with the improved technology they do 3 D scan which gives better idea. In government hospital they prefer ordinary scan if you are affordable you can go for 3D scan.