TBH, I don;t think it matters how much you put on, it's always those last few pounds that are harder to lose.
With Dd I went into hospital in a size 12, came out of hospital in a size 8, but I still had a horrible wobbly belly, with DS I went into hospital wearing a size 22 t-shirt, that was tight, I came home in a size 16-18 tracksuit and was in a 14 in a few weeks, but stayed a 14 for about a year as I didn't really try to lose the weight.
With both, even at such different sizes it was that last bit on my belly that was hard to lose.