I've been told I absolutely must go on the pill between cycles. But then I'm a weird case that has no cycle at all, and going on the pill in between means that I can have a cycle of however long we need, rather than potentially having to sit for 70, 80 or perhaps even 100 days or more in between. I did get the impression that it was simply because of that, and isn't a requirement for everyone, though.

BW