If you're already well trained, your body will tell you when to stop. But, you shouldn't be heroic. I did hard core aerobics through the 8th month of my 1st preganancy, back when this was very unusual. But, at the very end, I started walking and swimming. I was back doing my regular workout after 3 weeks post partum. With my second one, we decided to go on a family ride one day (I was not a regular rider, but did go out once in awhile). To make a long story short, my husband stopped in front of me, with the toddler on the back of his bike, in a seat. I thought they were crashing, stopped hard and the old fashioned down tube shifters stuck into my stomach. Five days later I was in early labor. It all worked out after 6 weeks confined to my house, but I shouldn't have been doing a sport I wasn't that familiar with. Though, that was the kid that became a racer...

Robyn