The Unit for Recurrent Pregnancy-loss at Rigshospitalet treats about 300 of couples with recurrent miscarriages a year. Together with the current examination program, the investigators plan to describe the uterine cavity according to abnormalities as septa, adhesions and further the condition for the endometrium regarding infection and hormone receptors. This description will include descriptive office hysteroscopy with biopsies for histologic - and immunohistochemically examinations.