Personally I hate gift registry for weddings so I guess the same would apply for a baby shower. I just don't think it's necessary. I was given a huge amount of gifts while I was pregnant and only got one clothing item that was a duplicate & it wasn't really as it was in a different size. The only other thing we got that was similar was two rockers but even then we found that one was better for when he was a newborn, the other for when he was a bit bigger.