I was just showing water weight gain in the first trimester since the baby was still so small and wouldn't "show", yet. However, I did start wearing 1st trimester pants and even some other small maternity clothes by week 11 just because they were more comfortable. Have fun! It's lots of fun getting a big tummy. I now have 7 1/2 more weeks to go and still feeling great. BIG tummy, though, since I think baby is supposed to be around 5 lbs. at this point. YIKES!