Ultrasound imaging is a technique widely used to detect birth defects. It uses high-frequency sound waves to produce images of the developing fetus and can identify structural abnormalities, such as heart defects, brain malformations, and limb deformities. Other common prenatal screening tests include blood tests to screen for chromosomal abnormalities, such as Down syndrome. Additionally, genetic counseling may be offered to parents with a family history of genetic disorders.