[Seroprevalence of human immunodeficiency virus infection among pregnant women in Brazzaville]. 
A serological study aimed at measuring the distribution and extent of the HIV infection in the population was carried out from 1 October to 30 November 1990 among 689 pregnant women seen during prenatal consultations in the Health Centers of the National Social Security Service.  Serological tests according to ELISA method were used.  They were anonymous and uncorrelated.  Specific seroprevalence was found to be high among young women between 20 and 29 years (10.10%) and among nulliparous women.  Some correlation was observed between the parity and the seropositivity; the seroprevalence was higher among nulliparous women (chi 2 = 52.4; ddl = 4; p < 0.001).  The authors recommend the reinforcement of preventive measures and the establishment of counselling in Mother and Child Health Care Centers (MCH).