I just started to notice that bending over to pick things up is harder. I actually need to open my legs so my belly has somewhere to go! Oh how quickly we forget this stuff! I also noticed when I bend forward from sitting my uterus doesn't compress like it used to. It's like having a giant rock in there! So weird!
I've noticed the last few weeks that if I bend over while sitting that I have an obstacle in the way I can't bend over well while pregnant from seriously like 4 weeks on - all the blood rushes to my head for some reason super fast. I've had this with every pregnancy and it goes away immediately after but I basically start squatting to pick stuff up from early on.