In 1903, the couple moved to Flensburg upon Henry being transferred, where they lived in a small house. Feodora found that the region's mild climate had a positive impact on her health. To further improve it and increase the probability of becoming pregnant, she took pills of arsenic and thorium. Her poor health recurred, however, and she again began suffering from toothache and migraines. In October 1904, a serious illness was blamed on influenza. Her further efforts to conceive included numerous visits to private clinics through the years, which often led to painful surgeries and procedures.