M.H.
Hi A.,
Stretch marks are a tearing of the skin and can be improved on by improving the elasticity of the skin. However, it won't happen overnight . I use a heart supplement, believe it or not, that is primarily grape skin and grape seed extract (two nutrients that are usually called beauty nutrients). The supplement is meant to do a lot of things including the restoration of the elasticity of the arterial system. What I've seen is that it has restored the elasticity of my skin as well. In that process my stretch marks have faded. An absorbable multivitamin will also help. The nutrients that you had pre-pregnancy need to be replenished. If you want to go that route I can give you some information on mine.
The "girls" need some weight training. I go to the YMCA and do "BodyPump." It does wonders. Again, a multivitamin will help because anything that works needs it's fuel. Muscles crave their nutrition.
You've got good advice on #3......time will straighten it out.
Hope this helped!
M.