Stretch mark cream🚫

Mal • Wife to Shane💗FTM💙Due 9.8.16
What has worked best for you all? I have a generic brand of cocoa butter right now that I use everyday but I'm so scared of getting stretch marks! (I know they are not a horrible thing) but I want to steer clear as much as possible! 
Anyone have any favorites that you swear by??
Is cocoa butter better than coconut oil?
Help! FTM and 18 weeks‼️‼️‼️