For me, the second image doesn't work. One of the booties is just barely out of frame and, outside the context of the other photos, how would one know it is a maternity photo?
The last image is the best, with nice light and composition.
My Pregnancy Photography Guide:
|Valley by the light of a blue moon by cjf2|
from Down in the Valley
|Lake Erie Stone Pier by yobbyt|
from Dock or Pier
|Hong Kong by Zephyr1977|