Nothing really gets rid of them once you have them except for Retin-A but you can't use that while pregnant or breastfeeding. And you have to use it while they are still purple otherwise the only option is laser. All you can really do in pregnancy is keep your skin moist and your body hydrated. I use apricot oil, Shea butter and break open vit.E capsules occasionally.
I've been using bio-oil my entire pregnancy and have no stretch marks even at 39 weeks. You should try it. It smells good and doesn't leave an oily residue on your skin :)