Are you referring to the linea negra? It appears on some women due to the hormonal changes your body goes through during pregnancy. The line is always there, however is is much lighter, and blends in with your skin tone until the pregnancy changes the color in some women. Yes it is really a pregnancy line, it does not appear unless there are pregnancy hormones at work in your body making it darken. It will go away after the pregnancy.
at 8:37 PM on Dec. 21, 2008