Attain IVF multicycle program anyone?

Anyone’s clinic use AttainIVF? Mine does and from what I am reading they offer multicycle discounts. How does that work? We are considering PGS due to my age (37 almost 38). I have high AMH and am expected to get a good amount of eggs but my IVF in my twenties only produced 2 blasts. I have this fear that we will end up with 2-3 blasts and PGS at my clinic is not per embryo, it’s one high set fee for a lot of embryos. With a multicyle package, would I have the option to freeze whatever we produce from first retrieval and do a second retrieval if we don’t get many blasts to work with so we can batch them together for PGS? I don’t think a multicycle makes sense for us otherwise. We have our big consult in two weeks and will

Be moving at a fast pace at that point since my RE has been following me for a long time ( he did our first IVF as well) and has already decided what protocol would be best ( vastly different from first IVF). And we have already done 95% of the testing needed for IVF. So I am trying to gather as much info as possible before we go to the appt.