Darkening/marks around belly button? (Photo included)

[lizzyttc2017]

Hi ladies,
I’m 29 weeks pregnant and the skin around my belly button is kind of dark and discoloured, I cant tell if it is stretch marks, bruising or just hormonal skin discolouration? (Some marks may be from my maternity jeans)

Anybody else had this?

It's just a pigmentation change caused by hormones, linea negra plus a bit more. Lots of women get it.

Totally normal. My belly button is getting darker as is the skin around my neck.