Hello, thanks for using health care magic. The darker regions you have are called chloasma. They are normal skin changes occurring in pregnancy due to hormonal changes. During pregnancy, there is increase in the levels of some hormones that in turn increase the secretion of the skin color pigment by cells in the skin called melanocytes. The secretion is however not uniform in all areas thus some areas are particularly affected and become darker. People on hormonal contraceptives some times have this same presentation. You do not need to border, they will fade away though gentle after delivery. Hope this helps you. Dr Achuo