Tips on avoiding stretch marks?

Kristen • 👼🏻👼🏻👦🏼👼🏻👦🏻👼🏻👶🏻Mum to angel twin boys Sebastian and Stirling, 4 year old Greyson, 2 year old Bentley and 9 month old Spencer
So I know stretch marks can't be avoided if your body is prone to them but what does everyone use to try to stop them being quite so bad? I've been using cocoa butter and I put baby oil on wet skin straight out of the shower then dry off. 
It's my first pregnancy and we found out last week we are having twins so I'm just foreseeing that I'm going to get pretty big!