Admissions to a mother-baby unit in a psychiatric hospital were reviewed over a 51 month period. Forty-four mothers (3 admitted twice) and 44 babies were admitted. Eighteen women were diagnosed as having major depression (1 admitted twice), 14 with schizophreniform psychosis, 8 with schizophrenia (2 admitted twice), 4 with bipolar disorder, 2 with anxiety disorders and in 1 diagnosis was deferred. Data are presented from these women's background and that related to pregnancy, as well as duration of stay and treatment in the unit. A description of the unit is also included.