| pubmed-article:7186050 | pubmed:abstractText | The levels of secretory IgA and of IgM and IgG in colostrums and milks obtained at various times postpartum were measured by radial immunodiffusion. Immunoglobulin A was the dominant immunoglobulin in all samples, and concentrations in colostrum ranged from 1.5 to 83.7 g/L (mean 32 g/L). Immunoglobulin M and IgG had mean colostrum concentrations of 1.13 and 0.53 g/L, respectively. Although the levels of each immunoglobulin declined with time postpartum, there was little change in the relative proportion of the immunoglobulin classes present. | lld:pubmed |
