Sorry, but I don't see anything in the photo that would give me reason to think she is gravid.
Another photo or photos showing us the last third of her body would be great, could you also take a photo of her while you're holding her up vertically. If she's building you might be able to see follicles stacking up on each other while in the vertical.
Check out this video I uploaded a few years ago it might help.
https://www.youtube.com/watch?v=cmP6eIC9jxk
Good luck
Brian