I'm 38 weeks and still wearing heels, not the 5 inch ones I used to wear before a I got pregnant, but still a heel that's a good couple of inches. I actually find that I am more comfortable in them than flats because they force you to tuck your pelvis in which stops me from arching my back. If I wear flats I inevitably end up with a sore back and my sciatica being aggravated. I even got my physio to agree that in my case I was better off wearing a heel than a flat