Social Care Involvement Before Pregnancy and Perinatal Mental Health Outcomes: A Data Linkage Study. - Catalao, Raquel; Broadbent, Matthew; Taylor, Billie Lever; Backer, Kaat de; Easter, Abigail; Ashworth, Mark; Hall, Jennifer; Howard, Louise M.; Wilson, Claire A.; Salgaonkar, Anuja (Health & Social Care in the Community, 2026)