Baby oil, palmers coco butter (you smell like a sweet shop), mio oil, Vitimin E cream, E45.... the list is endless.
In truth stretch marks a genetic and you will either get them or not - so speak to your mum. However rubbing some lotion into your belly is nice and helps you bond a little and have some 'bump and me' time. I haven't got any stretch marks and am unlikely to now, but I find that laying on the bed rubbing oil into my belly whilst listening to nice music is a wonderful time. Hoping to carry that on when little one is born and hoping she will remember and be soothed by it, execpt it will be rubbing lotion on to her!
Enjoy it is all part of the experience, and it is never too early to start.