a friend of mine asked me what it was like giving birth when she was due her first. when i got to afterwards, and mentioned the swelling down below, walking like a cowboy etc after a normal delivery, she looked really shocked and asked, why does it swell?
after she'd had her baby a few weeks later, i spoke to her on the phone. first thing she said was 'oh my god, you weren't kidding about the swelling, its huge!'
other things - cramp, piles, babies bouncing on your bladder as they get bigger