BACKGROUND:
As late marriage and childbirth become more common in Japan, age-related increases in miscarriage rates are predicted to increase. Grief following a miscarriage can significantly impact mental health and increase the risk of depression and psychological distress.

OBJECTIVES:
This study aimed to clarify the mental health differences among women who experienced early miscarriage and generate evidence to guide tailored psychological support.

METHODS:
Data were collected via a web-based survey of 400 women who had experienced early miscarriage. The survey was conducted from April to May 2025 with Institutional Review Board approval. Mental health status was assessed using the Kessler Psychological Distress Scale (K6). Background variables collected included age, number of miscarriages, and parental status (presence or absence of children).

RESULTS:
The mean K6 score was 7.32 (SD = 6.36), with 21.0% of participants meeting the criteria for severe psychological distress (K6 score ≥13). Women reporting three or more miscarriages showed a significantly higher proportion of severe distress (p = 0.015). Participants without children recorded significantly higher distress scores (mean = 9.25, SD = 6.63) than those with children (mean = 6.68, SD = 6.15; p < 0.001). Age and time since miscarriage produced no significant differences.

CONCLUSIONS:
Women with a history of early miscarriage show experience higher greater psychological distress compared to than the general population. The While the risk of severe mental health problems increases with the number of miscarriages, while having children may have confer a protective effect.

KEY MESSAGE:
Grief following early miscarriage exerts a lasting negative impact on mental health regardless of elapsed time, underscoring the need for individualized psychological support. Poster session 2 (Group A)