After pregnancy, not necessarily every pregnant woman will have stretch marks. Whether or not a pregnant woman will grow stretch marks varies from person to person, and is mainly determined by the woman’s skin quality, fetal size and lifestyle habits, as follows: 1. Personal skin quality: Some women will not have stretch marks because their skin is more elastic and their weight gain is not obvious after pregnancy. Stretch marks tend to appear on the abdomen, inner and outer thighs; 2, fetal size: if women consume too much energy during pregnancy, resulting in excessive fetal growth, the local tension of the skin exceeds the degree of body load, it is easy to stretch marks; 3, lifestyle habits: pregnant women who love sports are less likely to grow stretch marks. Because long-term adherence to exercise can promote the body’s metabolism, can increase the elasticity of the skin as well as enhance the resistance to skin stretching. Therefore, pregnant women can also effectively prevent stretch marks by exercising properly according to their own situation. Once the stretch marks appear, it is generally difficult to subside, so when pregnant, women should control their weight, or properly apply regular stretch mark prevention products, etc., can avoid or reduce the appearance of stretch marks. After the body returns to its pre-pregnancy state after delivery, you can consult your doctor to improve them through dye laser, intense pulsed light, fractional laser and other methods.