Stretch marks are caused by increased oestrogen, progesterone, and sudden or large weight gain where the skin is over-stretched. Although moisturisers help keep the skin soft and supple, they can't prevent or repair stretch marks. All you can really do is try to gain weight gradually through healthy eating, and know that they will eventually fade after delivery. You'll be in good company as it is estimated that about 90% of women get them.

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