Prenatal diagnosis in the 1990s.

Prenatal diagnosis has become widely available and detects an increasing variety of birth defects and potentially harmful medical conditions. Many of the studies are complex and must be performed within a specific time period. Most prenatal diagnostic sampling techniques have some degree of risk for the mother or the fetus, and all produce at least transient anxiety. Nurses are involved in identifying families at risk, preparing women for the procedures, providing support, and counseling patients after the results are known; because of this role, nurses need updated information. This review describes current methods for early identification of a potential problem, discusses a variety of prenatal diagnostic procedures, reviews the most common types of laboratory studies, and introduces future trends in the field of prenatal diagnosis.