I highly recommend the prenatal yoga classes at the Berkeley Yoga Center (843.8784 or Berkeleyyoga.com) for fitness during your pregnancy. It not only gives you the physical conditioning that is so important and desirable, but also the mental component so helpful in labor, with breath work, meditation, and conscious relaxation. I started yoga during my pregnancy, and now, three years later, am so grateful to have it in my life. I wholeheartedly recommend Cybele Tomlinson's beginning/intermediate yoga class on Monday nights from 7:15-8:30 at the Berkeley Yoga Center at Addison and Bonar, off University. The studio, a converted warehouse with brick walls and hardwood floors, is beautiful and peaceful. A bakery is on the ground floor, and the heavenly scent of baking bread wafts up through the floorboards as you're meditating at the beginning of the class and doing your yoga. It just adds to the general very special mood that the gifted teacher creates in her class. You don't have to know a thing about yoga... Or you could be quite experience: Cybele seems to accommodate all. Check it out. It's $40 for a 4 week series or $12 to drop in. Christy