Hi OP,
I have a 2 yr old DD who took 5 rounds of IVF to conceive. We have another 3 PGS-tested normal embryos in storage at the clinic and we've just started having these same discussions. Part of me wishes we only got one good embryo and didn't have to make this decision.
We went through so much trauma to get DD, we always said that if we were lucky enough to have a healthy baby then that would be it, we wouldn't go through another transfer cycle. I don't know if I could open myself up to wanting to be pregnant again, only to be devastated if it didn't work (not to mention the logistics/finances/physical impact of undergoing another transfer cycle with a toddler in tow). It seemed to us almost 'greedy' to want another baby when for a long time we never thought we'd have one child - just to be clear that's our thinking for us, I'd never imply that about anyone else's choices.
I had a v traumatic pregnancy, bleeding, prem birth, DD was in SCBU for the first week of her life and then had some minor health issues that led to an extremely stressful first year. We were 100% certain that we were done and happy with our family of three and she's now a happy, healthy, beautiful toddler.
And yet. The old broody feelings have returned. We've had a couple of conversations about how it would be nice for DD to have a sibling and how I'd like another crack at being pregnant, giving birth etc. But I don't think these are necessarily good reasons for having another baby as there's a high chance we'd end up with the same issues all over again. I'm 35 (was 33 when embryos were frozen) and DH is 39 so age not such an issue, but we're going back and forth tentatively. I think at heart DH doesn't want another but he'd do it if I really wanted to go for it. For now we've agreed to keep paying the storage fee and keep talking about it, but we're going to have to make a decision in the next year or so.
Sorry OP, I don't know if this is helping you as I'm just rambling a bit! Best of luck with whatever you decide 