When does fetal movement usually start to decrease?

I am 32 weeks pregnant, and in the past, let’s say two weeks, I’ve noticed an obvious decrease in fetal movement. I still feel him move enough (according to my kick counts), but not nearly as much as I used to. He used to be like an octopus in there, but now all I get is a random foot poking out, no more squirms and flips and limbs flying. Is this normal for being as far along as I am? When do you usually start to feel a decrease? Thanks!