I'm pretty sure I had the beginnings of mine by 10 or 12 weeks, and it was almost all the way up to my chest by 20 weeks! I hear for some women it never goes away completely.
I got it while pg with DD and it did not go away before I got pg with DS 9 months pp. It did lighten a little. I stopped BFing at 7ish months with #1. DS is now 6 1/2 months and I am still BFing and I still have it. It didn't get much darker after the initial fade, even getting pg again. I barely notice it now, in fact I looked down at my belly to see the status before answering this post
ETA: I guess I should have read the post more carefully- I got mine at 29 weeks.
I "knew" it was there during my 2nd tri, but DH couldn't see it until the middle of my 3rd tri. Mine was never really dark though. To be completely honest, it's more noticeable now than it ever was during my PG.
Re: Linea nigra - if you got one, when did it appear?
Ugh. I do NOT want to be one of those women!
I got it while pg with DD and it did not go away before I got pg with DS 9 months pp. It did lighten a little. I stopped BFing at 7ish months with #1. DS is now 6 1/2 months and I am still BFing and I still have it. It didn't get much darker after the initial fade, even getting pg again. I barely notice it now, in fact I looked down at my belly to see the status before answering this post
ETA: I guess I should have read the post more carefully- I got mine at 29 weeks.
In my bag: Canon 60D, 50mm 1.4, Tamron 28-75 2.8, 430exii