The best method for stretch marks.?

Im almost 6 months pregnant and i barely have any stretch marks, about 2 or 3 on my left hip and 2 on my right and im getting them on my worse then my stomach! Im using Palmers cocoa er stretch mark lotion and then rubbing in maderma on the stretch marks on top of that. Is there anything else that is proven to work BETTER? Any advice would be great, Thanks.