K.K.
I would recommend it. I did yoga before getting pregnant with my second child and then during that pregnancy. It helped alot with the aches and pains and relaxed me. I was often tired and didn't want to schlepp to go to yoga class
so yoga dvds/videos for pregnant moms worked best for me.
After I had my second child, I graduated to pilates which really helped with the tummy area. Good luck with the rest of your pregnancy and congrats!