Line on belly

[Hoping4peanut]

As I approached 12 weeks I noticed a line on my lower abdomen that comes and goes. Has anyone else noticed this? If so..anyone know why it comes and goes?

 

[Gizzyy]

It's called the linea nigra I think it's due to pigmentation caused by hormones. Nothing to worry about I don't think. Not sure about it coming and going though x