Other skin changes caused by pregnancy hormones may include brownish or yellowish patches on the face called chloasma and a dark line on the midline of the lower abdomen, known as the linea nigra. (kidshealth.org)
This is called as chloasma or also known as the mask of pregnancy. (giantmommy.com)
Chloasma (Mask of Pregnancy) If you've noticed dark, blotchy, brown, confetti - like patches of skin on your forehead, upper lip, and cheeks, you've got chloasma — what's often called the «mask of pregnancy.» (pearltrees.com)