To ensure that babies are in perfect health before birth, doctors routinely recommend a set of prenatal screening tests, as well as diagnostic tests. Most of these tests are performed from 11 weeks of pregnancy and continue until 13 weeks. While a prenatal screening test will ascertain whether it is a high-risk pregnancy or not, diagnostic tests provide more detailed information about the baby’s health condition, genetic disorders or birth defects. Additional diagnostic tests are advised for women who are at a higher risk of conceiving a child with disorders. Prenatal Screening Tests comprises Ultrasound Scanning as well as Chromosomal and Genetic Screening procedures.