My mum must have gotten AF back around 11mths after my sis was born, she had wanted to start TTC long before that as wanted a short gap between kids - she went to the Dr to find out if anything was wrong as no AF, unbeknownst to her she was pg with me at the time, LOL - just four weeks or thereabouts.

We always joke that I've got a thumb print on my forehead from the internal she had sorry if TMI...

Anyway 20mths between me and sis...

My sis was almost exactly the same as that, 20mths between my niece and nephew and she was getting way grumpy that she couldn't TTC as no AF...

But me, I got AF back after 6mths! DH and I held off for a bit. Five minutes anyway

So possibly genetic link? But for me not so much.

PS - glad to hear you still posting about thinking about TTC...