The study has descriptive purposes, with aim of assessing how turoctocog alfa is used in the everyday practice and to provide a baseline for the management of haemophilia A and does not involve any change in the clinical management of participants. Data will be extrapolated from the existing paper based medical records and uploaded to an electronic database specifically created for the study. Baseline information/history will be recorded at time of switching from previous FVIII replacement therapy to turoctocog alfa from the enrolled participants and outcomes will be collected according to participants visit format.