Did you experience early menopause?
I thought I'd read that this was likely to correlate.
I'm curious as mine started at 10 years old and I'm now 43 with no peri symptoms & pretty sure I ovulate every month. Wondering when I can expect it to start. I think my mum went through it at around 50. Did you through it at a similar age to your mum. Maybe this is a better indicator?