That depends on the type of hair and the area treated. An average of 5 to 6 laser hair removal sessions are needed to remove very dark, thick hair on the legs, bikini area, underarms and all body areas. You should therefore estimate an average of 6 to 7 months of treatment with around 1 month in between two sessions. More sessions – 7 to 8 sessions on average, or more – should be expected for fairer and finer hair and for downy hair.