[Need for systematic HIV serological study during pregnancy].

Background: To evaluate human immunodeficiency virus (HIV) screening usefulness in pregnancy and to know the prevalence of this infection in an urban area of Spain.

Patients And Method: Routine prenatal screening for antibodies to HIV was offered to pregnant women from Fuenlabrada-Leganés Health Care Area (Madrid) from 1992 to 1995. Unlinked anonymous screening of HIV was done with the sera from women refusing the assay or if it had not been offered.