Third Trimester

Hi mummies, i am 30weeks now, but my LO head alr down there. Heard from friend dont walk too much first until 33weeks, because afraid water broke because baby head alr down.. but my gynae said need to do more movement.. if think logically, what friend concern not totally wrong. That friend talk based on their own experience with 3child.. any idea or advise for this? :) #FTM #advicehelppls