The exact cause of the appearance of stretch marks has not yet been established.
The main provoking factors doctors believe:- hormonal restructuring. Towards the end of pregnancy in women increases the level of cortisol in the blood, and it is this hormone inhibits the formation of collagen fibers, which are responsible for the elasticity of the skin. Contributes to the appearance of stretch marks and progesterone, the level of which in the third trimester of pregnancy increases more than 10 times;
- stretching of the skin. Starting from 16-18 weeks, the woman's abdomen significantly increases in volume, the skin stretches and weakened connective tissue fibers can tear. With multiple pregnancies or polyuria, the likelihood of the appearance of strictures increases significantly;
- obesity. The greater the volume of subcutaneous fatty tissue, the more the skin is stretched and damaged connective tissue fibers.
Also a certain role is played by hereditary predisposition: if the mother or grandmother had stretch marks, it is very likely that they will appear in the woman herself.