I have 4 kids and had very bad stretch, I use a derma roller available on a popular auction site for around twenty dollars. I use this in conjunction with a vitamin a cream, here in australia it is known as ungvita and is used for nappy rash.
I have been using these for about 6 months and can guarantee all those out there thinking they are stuck with them forever or thinking about lasers or peels that this method works.
Some stretch marks were new, some over twenty years old, and I have seen a 75 percent improvement and will continue to use this method until they are all gone, patience is required as your body needs time to produce new collagen. Please don't despair. Try and you will get results like no other, and I have tried them all, creams, cloths, dermabrasion and peels.
Nothing is as effective at restructuring the skin, and as a mum of four I can tell you I had very bad marks on my tummy, breasts and thighs that are now almost invisible, not lighter in colour, mind-but healed and vanishing. Bless