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A Re-Examination of the Incidence of Circulating Immune Complexes in Normal Pregnancy

Circulating immune complexes were detected in 20% of serum samples from pregnant patients by the liquid-phase C1q-binding assay. Two other immune complex assays yielded negative results with the same samples. A careful case study was also carried out in which serum samples from before, during and after a normal pregnancy were analysed. The results are discussed in relation to the contradictory data previously published in this field.