Yes, as above--with the first one, I'd be concerned about the weight of the pregnancy pulling down on an already curved back. Also--hard to tell from the picture--is she narrow at the shoulders? and cannot see her brisket? The second one looks perhaps more strongly built for bearing kids, if not as capacious looking as the first. Perhaps her legs are a bit posty, but I gather that's a secondary concern? (I'm still learning.)
I'm not crazy about that first one, her neck is too thin she walks downhill she is weak in the chine and sloped in the rump. The second one is much better in my opinion she stiill walks down hill but her topline is much stronger. Her legs are tad posty but dont mind that too much. She needs more weight though.
-Very narrow and shallow in the chest, causing her to look disproportional and pinched in the fore rib. She is weak in the chine, taller in the hindquarters, and steep down into her rump.
*Looks for a buck who is very, very level along his topline, wide and capacious through his chest, and has a good spring of rib. You want him to be very blown apart, mostly in his front, because the doeling's flaw is in her constricted chest.
-A bit shallow in her body capacity. I would also like to see her with much more muscling and dimension.
*Find a very thick, massive buck with plenty of conditioning and size, but be sure not to sacrifice good conformation for that.
The others said it well. I might also worry about your first doe carrying her pregnancy. Are they both FFs?