Fetal anomalies can be diagnosed through various prenatal screening and diagnostic tests, including: - Ultrasound: Often the first step in identifying structural abnormalities. - Amniocentesis: A procedure where amniotic fluid is sampled to check for genetic conditions. - Chorionic Villus Sampling (CVS): Sampling placental tissue for genetic analysis. - Non-Invasive Prenatal Testing (NIPT): A blood test that screens for certain genetic conditions.