“…However, there is some debate about the relative importance of skin stretching in the aetiology of striae: one 16 group could not find any relationship between striae and the increase in abdominal girth among pregnant 17 females [11] and it has been noted that striae are rare over the extensor surfaces of joints (regions of skin 18 over a joint that is stretched when the joint is flexed) where the skin is subject to physiologic stretching 19 [12]. Less controversy exists regarding the possible role of glucocorticoids in the pathogenesis of striae.…”