It depends on the pg and the toddler. This is my second time doing it. I have found the last trimester the hardest both times, because I am soo tired and sore and need a rest, but my toddlers just keep going and going and going. Having said that I haven't found it too bad either time overall. Particularly if you can rest when they do. The biggest thing is that you often don't have time to just appriciate being pg. So often I just completely forget that I have a whole other little person inside waiting to come out.