There are lots of products out there claiming that they help prevent and erase stretch marks. Unfortunately, it is not true. Stretch marks are partly genetic and partly based on your own body. Being that stretch marks form in the deeper layers of skin, there is not much that topical creams and lotions can do other than keeping your growing belly moisturized and elastic. The main things that you can do to help with stretch marks is to stay hydrated (drink at least 8 cups of water a day), keep exercise as part of your routine (before, during, and after pregnancy), and keep your skin hydrated (this is where the lotions and potions come into play).
Some of the products I loved using during pregnancy were Palmer’s Tummy Butter, Palmer’s Cocoa Butter Stretch Mark Cream, and Bio-Oil Oil. Many of my friends also used olive, almond or coconut oil. There are lots of products out there; consult with your provider to make sure they are safe for your use!