I did four fresh ivf cycles over the space of twelve months - with a three month pregnancy and miscarriage in there as well. Three gynae surgeries in there too, one between each cycle.
It was torture but I felt like time was running out and the pressure to succeed drove me on.
Don't underestimate the need for an emotional break. When cycles fail or the toll of trying to keep all the balls in the air at once can all get too much at times - work, relationships, family - plus the effects of the hormones, fear, guilt, anger, disappointment, frustration, envy of others etc...
You need to be in the right headspace to do it, hence why after all of the above, I have decided to take a six month break, despite being 40 and acutely aware of time running out.
I have a different perspective now and realise that being emotionally ready each time is equally important as being physically ready to proceed.