To get the benefit, if you aren't into yoga already, I would recommend trying a couple classes at a yoga studio if possible, even if it's not prenatal yoga. That way you'll be sure you are using good form and getting some good instruction. Gym yoga, in my experience, is not the best place to learn. At least at the 2 gyms I tried it, the teachers didn't tell anyone if they were doing it wrong, and the people in the class were all over the place - and mostly pushing themselves too far and doing things wrong and potentially dangerously.<br><br>
Otherwise... poses not recommended during pregnancy are anything flat on the back, or inversions. Other than that, you just spread your legs a little more to make room for your belly as needed! And be careful of overextending your hips.<br><br>
The biggest thing to remember in yoga is to pay attention to yourself, and only do things if they are comfortable. Don't push yourself. It's meant to be a lifelong practice and you have loads of time to improve on your poses.<br>
Some of the best poses in pregnancy are super easy though, and I don't know that they would do them in regular classes - cat/cow for example - I'm sure you can google it. Oh yep, I found it here: <a href="http://yoga.about.com/od/yogasequences/ss/catcow.htm" target="_blank">http://yoga.about.com/od/yogasequences/ss/catcow.htm</a>. The prenatal yoga instructor I had with my 1st pregnancy said it helps with stretch marks because it stretches your belly skin a little, and you should do some each day.<br><br>
Bethany