I won't be post op for a month--God willing, since I worry something is going to happen and destroy my dream. But, yes, I think it is possible to lose girth, if by girth you mean your vagina narrowing and closing. That is definitely possible. My surgeon--Dr. Rumer--said dilation is everything and follow the instructions to the T, but if you can dilate more, do so. If you're closing, then you need to dilate more. I thought it was four times a day for 15 minutes each. But I have not got instructions left, but the doctor definitely said it can close up. Moreover, she said no sex within three months or you could really damage it. Your vagina has to heal and be kept open. I would up your dilation schedule. What they tell you to do is the minimum; do the maximum you can do. That is what will keep you open.