I also had to leave my rings off after about 4 months. I had terrible swelling and water retention (I put on close to 30kg while pregnant, a lot when you consider I started at 60kg), none of my shoes fitted and even bracelets were a struggle to put on from around 4 months. it wasn't until DS was about 3 months that I could get my rings back on, but it would've been 4 months before they were fitting again iykwim.