Yoga is fantastic whether you attend a class or even workout at home. Like PP stated, you have to modify twisting poses and limit any poses on your back but yoga works wonders for you physically, mentally, emotionally and even spiritually if you are so inclined!
As previous posters said, yoga is great for you (my OB highly recommends it a few times a week in addition to walking everyday). If you take a regular (non-prenatal) class, try to get there a bit early and talk to the instructor, she/he may have some tips & modifications for you. The previously mentioned no twisting is a big one, my instructor also gave me a few poses to do that are great for pregnancy whenever the class is doing something that's off limits for now. HTH!
I agree with what everyone else said. I do Pilates which is similar to yoga and there are many ways to modify for pregnancy. I agree with letting the instructor know so they can give you suggestions a good instructor should ask for injuries or special circumstances anyway.
I've been doing yoga my entire pregnancy! You are not supposed to do any inverted poses (bridge, headstands, etc), and be careful with twists-only twist your upper body. Its great for you!
Great during pregnancy! Yoga reduces stress, keeps your pelvic floor muscles strong for labor and can even help with your breathing during delivery. Amazon instant video has some good prenatal yoga videos and if you have a local YMCA, I'd try there, too.
TTC since 07/2010
BFP #1 11/10/11 Natural MC at 6w4d
BFP #2 01/23/12 MC at 12w. 2x Cytotek 1x Methergen; Genetic testing found Factor V Leiden and MTHFR. Started extra Folic Acid and Baby Aspirin then Lovenox
BFP #3 07/02/12 EDD 3/13/13 . Rainbow Baby born at 37 weeks, all natural, after 10 weeks of bedrest. BFP #4 ST. PATTY'S DAY 2014. EDD 11/25/14
Yoga is great for you. As others mentioned, be sure not to twist, lay on your back, or attempt inversions (e.g. standing on your head). Listen to your body and don't overextend yourself.
"It is better to light a candle than curse the darkness." - Eleanor Roosevelt
I know there's prenatal yoga that's supposed to be good for you. As with any type of yoga, I'd be careful and make sure you go to a class where the instructor knows their stuff - you can hurt yourself doing yoga poses wrong!
Re: Yoga during 2nd trimester
"It is better to light a candle than curse the darkness." - Eleanor Roosevelt