ABSTRACT
Serum and milk total proteins, its electrophretic fractions and immunoglobulins [IgA-IgM] were determined in eleven healthy pregnant women in their third trimester and up to the end of the third month postpartum. Values of serum total proteins, albumin and gamma-globulins show a significant fall in late pregnancy returned to normal levels after pureperium. Total globulins and alpha 2-globulin and beta-globulin significantly increase in late pregnancy reaching the maximum by 3-4 days postpartum, returned to nearly normal by the end of the third month postpartum; As regards to immunoglobulins, IgA values showed insignificant increase while IgM significantly increase through the follow up period. As regards to colostrum and milk the highest concentration of total proteins, globulins and immunoglobulins were in colostrum, these concentrations declined during the first 3 months of lactation. These changes show that Human colostrum and milk are rich sources of immunoglobulins particularly of serum IgA