I quite like the lighting as the shadows emphasise her curves shape and form etc, but I'm not sure about the pose, it has a slight " giving birth " look to it, maybe if her left leg was down flat , and a touch more light to the top of her head.
An interesting project, although it's not a subject I've done myself, it makes you realise how complex a nude study can be to get it " just right", a slight shift in the pose or lighting can make all the difference.
Tim