TTC stretch mark prevention

Sarah
Anyone use any kind of creams/lotions to prevent stretch mark while TTC? Mainly I'm thinking about my breasts, they are apparently the first thing to grow (TTC #1 and new to all of this).  I still have faded stretch marks on the sides of my breasts from when I went through puberty and I don't really want anymore.  I'm not a thin girl, so I don't show off my tummy, but I like wearing sleeveless shirts and the sides of my boobs sometimes show a bit.