Best prevention or solution for stretch marks (striae distensae)?

Mostly Genetic: Stretch marks are due to stress on the skin, however, every one's skin responds differently. Your genetic skin makeup will determine if you will get stretch marks. If you are pregnant you can try some skin massage and moisturizers but this will have a very small effect on if you get stretch marks or not. The only way to absolutely treat stretch marks is to remove them with surgery.