I am a dual citizen of the US and Canada by birth, although I am not currently a registered citizen in Canada.  Since I plan on changing my legal name here in the US, does anyone have any particular insight for possible complications or other information for registering citizenship as a trans woman?

If you are Canadian by birth you can send your name change and letters re gender change to Vital Statistics and have your birth certificate amended to new name and gender. No problem

The ambiguity I have is that I don't have a province for my "Vital Statistics" (since by Birth Certificate is in the US) and such issues are indicated by being handled by provincial law.

Dragging up an old thread here, because I have a similar (but opposite) issue - I was born in the US (Iowa), and currently (since age 13) live in Canada, and I am a dual citizen (born American, naturalized Canadian).  I have all my documents up to date.  My question is, when it comes time for doing the legal name change, do I need to do it in the US first, and then Canada, or does it not matter?  I'm thinking if I get it in Canada but not the US (for a time), it may make travel to the US difficult.  Am I worrying for nothing?  I haven't lived in the US since age 13 (I'm 54 now), and the last place I lived (the place I vote from) is PA.  Anyone have any advice?