Stretch marks?

Any advice or recommendations on what to use to help reduce & prevent more stretch marks? I have a few on my sides but they are starting to show on the top of my butt & underneath my cheeks. I have one small one trying to form on my stomach now. I'm 32 weeks & think of them as blessing since after all, all children are blessings. I just want to do what I can to prevent them from being so big & bulky. Any advice?