When I was pregnant I didn't realize until at the jewelers that my ring was to tight to come off without some persistance. My fingers hadn't swollen a lot, but my knuckle area had. I asked to use their bottle ofof lubricant though
Also...it seems like when its hot out my ring fits nicely (have to turn it to get it off, but only slightly) but when its cold it feels loose. Maybe that is just my imagination? Not sure.