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Screening in pregnancy.

Over the past 20 years, traditional elements of antenatal care have been supplemented by complex biochemical and biophysical investigations. With his/her knowledge of the patient and awareness of the principles of screening, the family physician is ideally placed to assess potential problems in pregnancy. This article reviews the rationale for screening for certain disorders in pregnancy. Genetic disorders, infectious diseases, and other specific conditions are considered. Some of the more recent controversies in prenatal screening are highlighted.