You may notice darkening of your nipples, bellybutton, and armpits during pregnancy. That’s completely normal. You’re also gonna get a dark line that goes from your bellybutton to your pubic area. That’s called the linea nigra and is also completely normal. The reason you’re getting these darkenings is because you have more hormones during pregnancy which stimulate your cells to make more pigment. All this is normal and is gonna go way a few months after you deliver. You also might be noticing some undereye circles that you didn’t have before, and it’s not due to sleepless nights. Actually it’s due to the increase.