Causes of Stretch Marks During Pregnancy

The Science Behind Stretch Marks Stretch marks are caused by the stretching of the skin beyond its capacity to expand. The skin consists of three layers: the epidermis, the dermis, and the subcutaneous layer. The dermis, which is the middle layer, contains collagen and elastin fibers that give the skin its strength and elasticity. When the skin is stretched rapidly, these fibers can break, causing the underlying tissue to tear. This results in scars that appear on the surface of the skin, which are known as stretch marks. Hormonal Changes Hormonal changes that occur during pregnancy can contribute to the development of stretch marks. The body produces hormones such as cortisol and estrogen, which can affect the elasticity of the skin. High levels of cortisol can reduce collagen production, making the skin less elastic and more prone to tearing. Elevated levels of estrogen can also affect the skin's elasticity, making it more vulnerable to stretching. Rapid Weight Gain During pregn...