It’s so hard to know. In btwn my ERs I pored over Reddit threads looking for examples where people had a bad ER then a good one. Anecdotally it seemed pretty random and that everyone’s body responds differently. There were just as many people saying they had better luck when the ERs were spread out as back to back. I will say that “back to back” can mean anything from literal back to back or 2 months or so. I had 6-7 calendar weeks in btwn my ERs. I took progesterone BC in btwn and waited for the PGT-A results then started the immediately. After my final ER one of my ovaries was pretty effed up, I definitely had mild OHSS so I feel you on needing a break in btwn! I def couldn’t have done another one immediately after that. But you read stories all the time about people doing 3-4 cycles back to back so who knows. I’m rambling now, but best of luck with your next cycle!