Background: Family-centered care places the family at the core of care, with family nurses playing a pivotal role in supporting and guiding members through pregnancy and the transition to parenthood and acknowledging the significant adjustments during these phases. Aim: To map the evidence concerning family nurses’ care for families during the transition to parenthood. Method: The scoping review followed the Joanna Briggs Institute (JBI) methodology, focusing on family-centered care during pregnancy adaptation and the initial months of parenthood. Using a PCC (population, concept, and context) strategy, the research covered various databases: Scopus; Web of Science; and CINAHL Complete, MedLine Complete, and MedicLatina by EBSCOhost. Results: A Preferred Reporting Items for Systematic Reviews and Meta-analyses extension for Scoping Reviews (PRISMA-ScR) flow diagram was used to present the results. Eighteen articles were included, mainly from the Middle East and Europe, including cross-sectional studies and reviews. Key findings addressed the transitioning process to parenthood, the impact of family characteristics, and the role of family nurses in enhancing these processes. Conclusion: Home care is considered vital during this transition. Family nursing should concentrate on both individuals and the parental subsystem, addressing social determinants equitably. Through these efforts, they empower families to establish an optimal environment for children’s development.