Objective: To demonstrate the importance of perinatal mood disorders screening. 
Background: Pregnancy depression among Brazilians can range 7.2 to 43%. Thus, the recognition of vulnerable patients becomes essencial to early approach. 
Methods: Women under 28 weeks of gestational age answered the questionnaires "Gestacional Profile", "Edinburgh Postpartum Depression Scale" and "Mood Disorders Questionnaire". A new interview happened between 34-40w and 48 hours after delivery – in this one was associated the "Puerperium Profile" questionnaire. Patients referred to psychiatry (EPDS ≥ 13 or/and MDQ positive) received the final diagnosis and follow-up. 
Results: 50% of the 30 patients interviewed were referred to psychiatry, and "Depressive disorder" was the stand out diagnosis (33%). Planned pregnancy (RR 0.56,CI 0.17-1.75) and breastfeeding (p 0.095) were protective factors. Family and personal history of mental disorders were shown as risk factors- alcoholism (RR 3.85, CI 2.03-7.29), bipolar disorder (RR 3.22, CI 1.87-5 , 54) and depression (RR 2.75, CI 1.07-7.03). Satisfaction with relationship might be a protective fator (RR 0.25; CI 0.13-0.49), while abusive relationship (partner humiliation and aggressiveness) are risk factors (RR 3.5, CI 1.29-9.47 and RR 3.85, CI 2.04-7.29 respectively). 
Conclusion: To include the screening for mood disorders in prenatal follow-up might be cost- effective, contributing to the reduction of the stigma and improving the quality of life of the patient and their families.

13 - SCREENING AND RISK FACTORS FOR PERINATAL MOOD DISORDERS IN SOUTHERN BRAZIL