I didn't run the Ragnar, but I did do a triathlon when I was 15 weeks. Granted, that's a lot different, but I was pregnant with twins. I ran daily until put on bed rest at 18 weeks, though (due to unrelated complications). If your doctor and husband are supportive, and you take the appropriate measures to train so you don't sprain or hurt anything, you should be fine. Up your water intake now, though, as you can get dehydrated a lot easier when you are pregnant. Also, I suggest doing a "trial" run to make sure you are up to it. The baby can handle it, but make sure you can. Wrap your boobs up and wear a sports bra. Trust me on this one. They won't hang as low later in life if you do, lol. Up your potassium intake now. Watch your carbs and sodium intakes so you balance them properly. Good luck:)