Effects of oestrogen and progestogen on serum levels of α2-macroglobulin, transferrin, albumin, and IgG

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Abstract
The levels of four serum proteins, assayed by a radial immunodiffusion technique, have been measured in healthy women who had been given either the oestrogen or progestogen component of a combined oral contraceptive preparation for three weeks. Raised α2-macroglobulin and transferrin levels were found after oestrogen treatment but albumin and IgG did not significantly alter. In the progestogen-treated group all four proteins remained unchanged. The four proteins have also been assayed at frequent intervals during the normal menstrual cycle. No evidence of cyclical variation was found.