Take a glance at how the pectoral muscle flows into the shoulder, it looks now as though the left armpit is too low right now.
Also, look up how the bones appear on the surface at the back of the elbow joint, and take note that the lower arm kinda bulges on both sides, rather than just the top as you have it now. it is more properly done at her right arm so far.
Good job coming around so far, though you may wish to have less darkness below the belly button before you actually reach the groin area; the volume now looks shaded as if a really deep gap is occuring. Keep it up!
