Wow, how exciting for you both. A baby bring so much MORE happiness to your lives
I wish I could give you feedback from when I was prego, but can't. I was so ill, that just getting up to go to work green and on a roller coaster had me spent at all times - so the gym was OUT.
But my doctor had recommended that I could weight train, just much lighter than I was doing on the norm. He even said I could do core work up until 3 months, then to coast out the rest of the pregnancy. Light cardio as well.
Check with your doctor and see what he recommends for her. Baby comes first, but if your wife can still keep physically fit, this too will help with labor.
Good luck to you both on the next wonderful months and years of your lives.
when is she due, if I missed it?