Your body goes through countless changes during and immediately following pregnancy -- sometimes, you barely recognize yourself. Among those changes is nipple color.
Almost all pregnant women experience a darkening of the nipples (and areolas) that begins during pregnancy. It results from a hormone-triggered, temporary increase in melanin and affects other skin areas, too. The pigmentation typically starts fading once pregnancy and/or breast-feeding are over.
It can also go the other way. Nipple-blanching during breast-feeding, unlike nipple darkening, is a sign of a problem. It could indicate, among other things, a poor latch-on or a condition called Raynaud's phenomenon (which is less common). Both are fixable. Call your doctor if you notice your nipples turning white and likely feeling sore, too).
Next: Have they told you breast-feeding burns tons of calories?