Hey Carlah,
I am in the exact same position myself..currently TTC but also wanting to get down to 11stone!! We will see which one comes first but yes, i thought the same as you at first..whats the point if im gonna put it all back on and the some?? but as others have said, it makes a lot of sense to be housing a little babba in a healthy slimmer body so im gonna keep right at it. Lots of luck with the baby trying x