I am in Stage 1. I am getting to the point in my pregnancy (17 weeks) where I (a) probably shouldn't lie on my back (b) definitely should not do crunches. I am looking for core exercises to sub in for the crunch. My amateurish internet research has revealed that there are about 10,000 different ideas of what are "safe" core exercises for pregnant women, many of which are in direct conflict with each other. I was going to sub in the plank for the crunch, but I read that exercises that force your stretched abs to hold your guts in against gravity are a no-no (according to this, push-ups are out too

). I bought a pregnancy fitness book but the abs exercises they suggest are super lame, isolated exercises that I doubt are going to do anything for my fitness level. Any suggestions for what might be both safe
and a decent workout for someone on the way to a Humpty Dumpty figure?
Thank you from me and my little yolk!!