But lets see what I can point out.

Ok I think the most important thing is the missing hip bone (as you allready pointed out ), but it almost looks like she is missing a ribcage too.

The next thing are the legs, the upper half of it was too thin/short and curved too much at the end.
The lower part well no comment .

Uhm breasts = curved ok

And the face it seems your characters dont have a jaw line which looks kinda weird.

Dont get that long list of suggestions wrong.
It is a quite good drawing and you can see from my paint over that the changes are normaly only a few mm apart from your drawing.

Also note I'm far from perfect myself and that reflects in the paintover .

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Wer nicht vom Meister lernt, lernt nie etwas.