Not that im against stretch marks i have plenty from the years of my body growing but if we can help it why not?? I figured you can never start too early. Im currently 16+3 and bought these through online searching and other recommendations. I havent opened the bio oil yet but from just the two palmers my skin ( whole body not just my belly) has never been more hydrated and healthy looking. Ive always had such dry skin and lotion never was enough, oil has been a whole life saver.