[The role of cytokines at the fetomaternal interface]

Various mechanisms are necessary for regulating the survival of the semiallogenic embryo in the maternal organism. In addition to the lack of classical MHC class I and II antigens at the trophoblast the cytokines play an important role at the fetomaternal interface. Different cytokines regulate the immunological processes with an emphasis on the Th1/Th2 balance. In contrast to the peripheral blood there is a certain composition of immune competent cells at the fetomaternal interface. There are many different interactions between the endocrine and immunological system. Hormones modulate the secretion of certain cytokines and vice versa. In reproductive medicine it is of specific interest to evaluate these functions for treating problems during the early pregnancy.