[The impact of stress in the maternofetal relationship: an immunological approach].

Pregnancy is controlled primarily, though not exclusively, by a delicate equilibrium between locally acting growth factors and cytokines, some under steroid control. The hypothesis considered here is that stress is able to influence the equilibrium between cytokines and thus lead to abortions or implantation failure. We thus detailed the studies on that topic in order to explore the psycho-neuro-immunological mechanisms concerned. The duration of stress, the patient's strategy for coping with this and the social context might be able to produce some opposite immunological effects. Thus, the link between stress and the immunological events induced is complex, and much care is needed for such patients.