Pregnancy hormones bring many changes to your body, including changes to skin appearance. A combination of hormonal influences and changes in your body’s immune system can darken certain areas of your skin. Your breast nipple and the aureola surrounding it become darker. You can get a line of pigmented skin extending from your belly button to your pubic area that becomes dark. This is called “linea nigra”. You can also develop what is termed the “Pregnancy Mask”. This is almost a butterfly darkening of the skin in your cheeks and across the nose. We are not sure why this occurs, but some women also experience it on the birth control pill. So it is clearly related to the hormones. It is not unattractive, merely a sign of your fertility. Enjoy your new appearance.