Stretch marks. Striae Gravidarum. The marks of pregnancy. Call them what you will. But they are the one thing that all women dread will occur as soon as they get pregnant.
But what are stretch marks anyway? And why do they occur?
Well, the reason lies in the anatomy of the skin. The skin has two layers a thin upper layer called the epidermis, and a thicker, lower layer called the dermis. Scattered in the dermis are fine protein filaments called elastin that, like a piece of rubber band, are capable of stretching on being pulled. But just as a rubber band can stretch only so far and no further, these elastin fibres can also be stretched only to a certain extent. If stretched further, they snap. The increasing bulk of the uterus during pregnancy causes the skin to stretch to a great extent and the elastin fibres are torn. The torn elastin produces scars on the skin called Stria Gravidarum or stretch marks.
They occur on the lower abdomen of all pregnant women, right?
Well, right and wrong. They appear in most pregnant women, but not in all and not just on the lower abdomen. Stretch marks occur when the skin is stretched in a very short period of time,...
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