My DD was the result of IVF treatment and is now 9 months old

DH and I went back to the hospital today to start the ball rolling with another attempt next year which will involve frozen embryo transfer (we have 5 embryos in storage from our last 2 IVF attempts) anyway...
the doctor said that I will have to wait til I stop breastfeeding before they can go ahead as my periods/hormones must be allowed to return to normal. This isn't a big problem as I'd already decided to wean my DD at 12 months and the process has already begun with us successfully dropping her 11am feed (she is on 3 very good solids meals plus snacks each day). I don't think we'll have a problem dropping the 3pm feed in a few months, and I guess that the morning feed can be replaced successfully with her solids breakfast. The one I'm worried about is the evening feed before bed!
I know it's more about comfort than food, we both enjoy the closeness of that feed. So my question is, when the time comes, what's the best way to wean DD from this feed? Under 'normal' circumstances I would probably have continued with this feed until my lo was ready to drop it, but I'm not getting any younger and we'd like to try for another baby. I'd just like the transition to be as easy as possible for both of us
