Hi T.,
I am the owner of Stroller Strides in Orlando. I want to just say that yoga and exercise can be wonderful tools to help alleviate many of the complications women experience during pregnancy. I am a certified "Fit To Deliver" instructor, which focuses solely on prenatal fitness and preparing your body for the birthing process...and we are absolutely NOT allowed to work with high risk pregnancies. There is a lot that could happen, and standard rule of thumb is prenatal classes are all wonderful tools, so long as the mama is not high risk. Please check with your doctor before participating in any classes. Many instructors will take you in without requiring doctors permission...but you could be taking a huge risk.
I understand your desires to prevent a difficult delivery...but taking a full yoga class or even a full DVD may do more harm than good. There are very low key exercise movements you can do while sitting/lying down that will still help strengthen your tummy muscles and your "CORE" (the muscles that surround and protect your baby) as well as pelvic floor exercises that will have the same effect in preparing your body for delivery again. (**Never underestimate the power of pelvic floor exercises**)
Take it easy and focus on contracting and releasing your CORE muscles a few times a day. Play with the way you contract those muscles: Squeeze and hold, gradual squeeze and hold, pulsing squeezes, etc. Mix it up a big, but focus on hitting each of your muscle groups around your midsection (there are 7 of them!) ;)
(If you're a picture person...I recommend taking a stroll to the local bookstore and browsing through the FIT TO DELIVER book for some movement ideas).
Good luck to you!! I'm sure everything will be fine :)
B., Franchise Owner - Stroller Strides