A [i]linea nigra[/i] (Latin for "black line"), is an area of hyperpigmentation (darkening of skin) that runs down the abdomen in the form of a thin line, seen during pregnancy. It occurs due to increased levels of melanocyte-stimulating hormone, which is also responsible for the [[dark_nipples|darkening of nipples]] in pregnant women.

h4. See also:

* [[pregnant]]
* [[dark_nipples]]
linea nigra