The pregnancy hormones estrogen and progesterone are thought to make the pigment-producing skin cells (the melanocytes) react more strongly to sunlight. This causes dark brown splotchy areas on the chin, cheeks, nose and forehead known as chloasma, melasma or "the mask of pregnancy".

Chloasma affects up to 70% of all pregnant women. It can show up with any skin type, but olive and darker complexions are especially at risk. The good news is that chloasma is preventable in all women by sun avoidance and daily use of a facial sunscreen SPF 25 or higher. Remember to wear sunscreen even on cloudy days and indoors, because UV rays can penetrate both.

Belli's Anti-Chloasma Facial Sunscreen SPF-25 is a lightweight, oil-free, tinted sunscreen that blends naturally into skin, and can be worn underneath makeup. $24. Click Here to Order.