Background Postpartum depression is one of the most common psychological disorders of women after childbirth. Despite the importance of social support as an influencing factor, there have been few studies on the trends and characteristics of social support as it relates to postpartum depression. Aims To explore the trends in postpartum depression and social support, to cross‐analyze the correlation between the postpartum depression trajectory and the social support trajectory, and to investigate predictors of changes in postpartum depression trajectories. Methods A prospective repeated‐measure study and convenience sampling were used to recruit 230 women at 1, 3, and 6 months after childbirth. Structured questionnaires were used for data collection. Trajectory analysis was used to explore the trajectories of postpartum depression and social support during the 6 months after childbirth, and polynomial logistic regression was used to explore predictors of the trajectory of postpartum depression. Results Postpartum depression was at its most serious in the third month after childbirth, showing patterns of low‐risk, moderate‐risk, and high‐risk trajectories. Social support also showed low, moderate, and high patterns, and the trajectory of postpartum depression was significantly related to the trajectory of social support. The predictors of moderate‐risk and high‐risk postpartum depression were also found in this study. Linking Evidence to Action Postpartum mental health education and online learning systems should be used to increase social support for women after childbirth and reduce the incidence of postpartum depression.

Physical symptoms induced by pregnancy are often perceived as a normal part of the physiological process and therefore not commonly discussed in clinical settings during prenatal care. This study aimed to explore how pregnant individuals adapt to physical symptoms related to their pregnancy, using the perspective of collective sensemaking. A retrospective study design with an inductive thematic analysis approach of qualitative data extracted from web‐based forum posts was conducted. Among 574 initial posts and 2801 comments, three themes were identified: (i) awareness of changing pregnancy body, (ii) uncertainty about physical symptoms, and (iii) coping with discomforts associated with pregnancy. A shared identity as a group of individuals dealing with similar challenges enables pregnant individuals to develop a better comprehension of their experiences. Healthcare professionals should recognize the importance of individual and collective sensemaking in pregnancy forums and strive to provide a supportive and empathetic environment for pregnant individuals to share their experiences and seek guidance.