[Frequencies of blood groups, ABO and Rh D incompatibility in post-delivery women and their liveborn].
OBJECTIVE
This study aimed to assess the frequency of different blood phenotypes and to predict the risk of Rh D alloimmunization and maternal-fetal incompatibility in a Brazilian population living in the West zone of the city of São Paulo-Brazil.


METHODS
This descriptive study evaluated 2,372 post-delivery women and their liveborn during one year. Blood types were analyzed by means of tube agglutination tests.


RESULTS
The blood type frequencies were: 50.67 O, 32.17 A, 13.45 B, 3.75 AB, 90.34 Rh D(+) and 9.66 Rh D(-). ABO maternal-fetal incompatibility was detected in 18.4% and Rh D incompatibility in 7%.


CONCLUSIONS
The fraction of Rh D(-) population at high risk for Rh D alloimmunization was 82%, emphasizing the importance of Rh D alloimmunization profilaxis.
Baiochi
Eduardo
E
Escola Paulista de Medicina, Universidade Federal de São Paulo, and Hospital Municipal, Brazil. baiochi@ultrarapida.com.br
Camano
Luiz
L
Sass
Nelson
N
Colas
Osmar Ribeiro
OR
D000017:ABO Blood-Group System / Q000276:immunology; D000372:Agglutination Tests; D001938:Brazil / Q000453:epidemiology; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D010641:Phenotype; D049590:Postpartum Period; D012189:Retrospective Studies; D012203:Rh Isoimmunization / Q000453:epidemiology* / Q000276:immunology; D012307:Risk Factors
D000017:ABO Blood-Group System