Every time I see an image like this one it brings back a flood of emotions and reminds me when my wife was pregnant with our children (now 15 and 9!). Women are much braver than men - if it was down to us to give birth there would be no problems with overpopulation in the world :-)
The black and white really works for this image. I love that you have contrasted her soft smooth skin and curvy body against the rough and angular brickwork. Her pose is awsome too. Very engaged with the baby growing inside her. Well done.