The report focuses on psychosocial risks, protective factors, and service gaps during the first 1000 days of a child's life and may inform the implementation of effective, evidence-based practices. The research evidence is synthesised by mapping effective psychosocial interventions and integrating Nordic expertise within the Maternal well-being framework (WHO). The findings show that psychosocial challenges are complex and cumulative, with parental mental health playing a central role in family wellbeing and child development from before birth. Effective interventions exist, but they do not reach all families or all family members equally, nor do they adequately address all needs and protective factors, particularly among minority families and those facing multiple risks. The findings signal the need for clearer care pathways and Nordic collaboration to address these gaps.