A few weeks back I was asked by a co-worker to take her pregnancy pictures. It was a fun session, I guess the fact that we work together made it easier on both of us, besides  she is easy to photograph and was not be afraid of the camera. Her idea was to keep it simple; we used a pretty basic black and white back grounds and 2 lights ( Canon 580 EX as a main Canon 430 EXII as a fill and a Canon 580 EXII as the master) 2 umbrellas and that was about it. The lense used was 90% a Canon EF  24-70 mm 2.8 and for the rest the Canon EFS 10-22 mm 4-5.6 and Canon EF 70-200 mm 2.8 IS.