Cass, that is a really hard one hun. In our first cycle we had a total of 2 good embryos, one was fresh transfer (successful but the pg eneded up as a late loss) and the second embie was put on ice for approx. 12 months and then we used that embie which then became my LO who is now 15 months old. We are hoping to do another round of IVF very soon as we would dearly love 2 earth side babies, and I often wonder what would happen if we were lucky enough to end up with a couple or more good embies......naturally we'd put one in and if the others were suitable for freezing we'd freeze them. But then......would we? I'm 41 now and I don't think we could handle a 3rd child at our ages (please no offence to the lovely older ladies TTC, my energy levels are shocking now!!lol). So basically I don't know what I would do with our left over embies if we had them (my FS will only transfer one and one only as he is very weary of twin pg at my age).
Do you want to have another child or two? If you do, use up your existing embie(s) when you're ready. As for the rest of the embies? Another option is to donate them for science. I think if we had some spare ones I woul probalbly do that, as I don't think I could donate them. Oh I don't know!! Maybe I couldn't do that either! GL hun, I hope you can work it out and come to a decision both you and your DH is comfortable with.