[Graft versus host reaction following materno-fetal transfusion. Apropos of 1 case]

After GVHR by probable maternal-foetal in utero transfusion, a male infant carrying a serious combined immune deficit (DICS) has presented a second post transfusional GVHR. On the occasion of this observation, the authors recall the main signs which permit to evoke this rare diagnosis as early as possible, as well as some main preventive measures that can be applied in current practice.