What promises have you made to yourself about how you will or won't behave, if bastard infertility goes away and you actually have a pregnancy / baby / toddler / small child? What have you seen from other parents that made you think 'you don't know how lucky you are, I will never do that!"
Ranting or lighthearted or unrepentently judgey, it's OK, and don't worry no-one here will hold you to them!
I'll start - if I am lucky enough to have a child I will never call it a fucking shitbag, especially if it is behaving well at the time, like a mum did last week during a flight I was on.
And - if I am lucky enough to have a baby, I will never say to anyone who has no kids "oh you should really crack on with it, especially at your age you know, ha ha!"
One more: if I am lucky enough to have a baby, I will not complain about night feeds / sore boobs / lack of sleep to people that I know are struggling with fertility or miscarriages (and if I am stupid enough to do that I will not be offended by the massive FUCK RIGHT OFF that comes my way!)