C3 polymorphism and the antibody titres in pregnancy: use of a non-barbital buffer for C3 typing

The C3 phenotypes were examined in 391 pregnant women classified according to the level of 'immune', 'natural' and 'irregular' antibody titres. No significant association between the C3 types and antibody levels was found. The sera were also typed for C3 with a non-barbital buffer.