Mom's Physical Fitness

I know it is important to stay healthy and active during a pregnancy.  Being fit helps you feel better while you are pregnant, makes labor a little easier, and helps you get back to being you after baby arrives.  So, I am looking for some tips for being a fit mama from you girls.  Here are some of my questions on the subject:

How far into a pregnancy can you exercise the way you normally would?

Can you exercise at all when you are getting close to Labor Day?

What are some good low impact things you can do for two?

I have heard swimming and yoga are good during pregnancy.  Do you agree? Any other activities I should know about?

Is it really possible to get your pre-baby body back?


Thanks for your advice!