<strong>Background:</strong> This study aimed to elucidate the experiences of a woman with type 1 diabetes during the course of her pregnancy. <strong>Method:</strong> This case study involved 1 participant. Data were collected through a semi-structured interview. <strong>Results:</strong> The data of experiences during pregnancy of Mrs. A comprised 20 codes, 5 categories, and 11 subcategories. The 5 categories were [abnormalities in the delicate body], [difficulty in blood glucose control for safe childbirth], [the burden of visiting both obstetrics] and [internal medicine departments], and [hope for safe childbirth]. <strong>Conclusion:</strong> The categories extracted in this study included terms that suggested negative experiences, such as “abnormality”, “difficulty”, “inconvenience”, and “burden”. Mrs. A might have used these negative terms due to the difficulties in controlling her blood glucose levels.