Hiya Leanne, I’m 6 weeks post op. I’ve been using bio oil from week 1, and although it doesn’t prevent them it claims to make them less noticeable (which seems to work). But my main reason for using it was based on advice from my nurse, which was to massage oil in twice a day to help prevent scar tissue from building up. I have to admit it’s bloody expensive, but a little goes a long way and still have 2/3 of a bottle left. Haven’t used it on my scars yet as I don’t see the surgeon for another 2 weeks so I’d rather wait until I have the all clear but so far I think it’s good value for money xx