How to prevent skin darkening during pregnancy?

Skin darkening: Some women have a brownish darkening of the facial skin. This change is called the "mask of pregnancy." it is more common in women with dark hair and pale skin.The woman usually has brownish, uneven marks on the forehead, temples and middle of her face.Sometimes the marks appear around the eyes or over the nose.The darkened areas may get even darker when exposed to sunlight, avoid sun exposure.

Stay out of the sun: During pregnancy your body excretes something called melanocyte stimulating hormone (among many other hormones) which causes darkening of the skin. There is nothing you can do to prevent this, but you can minimize is effect by staying out of the sun, or applying a good broad-spectrum sunscreen lotion (spf ~50) every day.