I found this gown at a second hand wedding dress shop and I knew it would make the most beautiful maternity gown! And I was right! It already had a long flowy train that parted down the middle so I just did some alterations to the front and made the base split down the centre.
I started by cutting the middle layer/panel out because it wasn't going to fall right once I split the centre. I ended up making the middle panel into a slip to go under the dress so it wouldn't show any leg for a more modest gown. I also took the lace edging off the bottom. I still haven't decided what to do with that part! :P
After I cut the split, I hemmed the edges. I also had to make a few alterations to the back near where the zipper was because I wanted to make it able to fit a wider variety of maternity clients.