It's called the linea nigra, or 'black line', and according to Cleveland Clinic, it can be defined as a dark vertical line that appears on the skin of your stomach during pregnancy - it's even ...

Physiologic changes in skin Pre-existing conditions that change with pregnancy Specific changes that are directly related to the condition of pregnancy Linea nigra means “black line” in Latin ...

The so-called linea nigra, or line caused by hyperpigmentation ... The boy’s cruel barb about the black hair on my mid-pubescent arms was all the confirmatory ammo I needed, and thus began ...