This article reviews the women admitted to Mother Baby Psychiatric Units in 2002, in the State of Victoria, Australia, looking at characteristics of postpartum disorders with respect to admission and outcome in a region with a high number of mother-baby unit beds relative to other Australian regions and other cities. Differences among units are noted, including the differential impact of whether the unit is associated with a psychiatric service or an obstetric service. This includes length of stay and referral patterns. Details of diagnosis, admission and outcome are compared to similar admissions in the United Kingdom, with similar factors predictive of poor outcome, defined as separation from the infant. Mother-Baby Units have an important potential role in improving these outcomes, with longer-term studies of these women needed.