Re: Aikido and pregnancy
According to John Ratey in SPARK (it's on amazon) exercising well into pregnancy will have positive effects on both mother and baby, effects that last long after birth - kids more intelligent, healthier than if mum wraps herself in cotton wool and hides away. Mum's back in the real world more quickly after the birth, and post-birth exercise also combats post-partum depression. Has something to do with "brain derived neurotropic factor" that your body makes when you exercise - stimulates brain growth in both the mum and the fetus...
Note: I'm not making this up, merely citing an author. I'm not pregnant nor do I ever expect to be so... 8-)