I was getting curious..So I found this.
Stretch marks occur when expanding skin is stretched to its limit and tiny tears appear in the supporting layers of skin. Stretch marks are quite common in pregnancy; about 50-90% of women will get stretch marks on their abdomen, breasts, thighs or buttocks during pregnancy.
What causes stretch marks
your chances of getting pregnancy stretch marks depend on a number of factors. Family history makes a difference-if your mother got stretch marks, chances are you'll have them too. Ethnicity is another matter-women with darker skin are less likely to get stretch marks. Weight gain and weight loss can also change the magnitude of your marks. Be sure to keep yourself hydrated, as this will help your skin stretch.
What can I do about stretch marks?
The best solution for getting rid of stretch marks varies from woman to woman. There are many options available to women seeking to remove stretch marks. Using a cream, like cocoa butter cream, can work by saturating your skin with moisture.
A good way to get rid of stretch marks is to help repair the collagen and elastin growth in your skin. Specially formulated stretch mark creams aim to rebuild the structure and promote the rejuvenation of your skin's layers. These natural creams contain cocoa butter, wheat germ oil and lanolin to help heal and moisturize your skin.