Prenatal diagnosis refers to medical tests performed during pregnancy to identify potential health issues in the developing fetus. These tests can detect genetic disorders, structural abnormalities, and other conditions that may affect the baby's health. Common methods include ultrasound, amniocentesis, and chorionic villus sampling (CVS). The information gained from prenatal diagnosis can help parents make informed decisions about their pregnancy and prepare for any necessary medical care. While these tests can provide valuable insights, they also carry some risks, and the decision to undergo testing should be made carefully in consultation with a healthcare provider.