Her under-chin area looks awkward in the first shot...as far as "accentuating her bump", the second photo does that as well, or better, with that subtle see-through bottom edge of the bump being revealed through her dress, against the backlighting...while you might like the first photo for personal reasons, she looks, well, bad in it...her neck muscle is simply bulging, her left leg looks oddly spindly and weird, and her stance seems awkward from the weird legs, to the backward-leaning body, the head away from the camera, and the strained, bulging neck cord muscle..the second photo on the other hand has a smooth, harmonious "base" at the bottom, formed by her dress material...the small of her back has that kind of "swayback" look that later-stage pregnant women sometimes develop...hr gaze harmonizes WITH the pose and her hand and her belly...and there's awesome light on her face, bustline, and the belly...she also has a nicely-lighted cleavage line, and of course, the peek-a-boo see-though revealing the very bottom of her belly...
Those are the kinds of things I SEE,as a stranger, a third party, who was not there...to me, #1 is nowhere near as good as #2. I don't mean any offense by that comment, although I can see that some might be taken, but this is a C&C post, and I am me...I would not want to show #1 if I had #2...#2 unifies almost everything, whereaas shot #1 has a lot of what I consider to be subtly negative body posture, and discordant body language.