I'd love a child but sensible head says no I shouldn't, and reminds me of all the stuff I've read about how once you have a child your own happiness is basically dependent on theirs for the rest of your life.
I'm prone to anxiety and very good at catastrophic thinking so feel this may be a hint I'd be a terrible parent 
How do you not worry about them all the time? That they won't get sick? That a dreadful accident won't happen to them? That they won't get serious depression as an adolescent?
How do you stay sane and level while knowing you can't protect this person you love so much from, well, life doing what life does?
I feel overwhelmed just thinking of it! Which again, I realise, probably means I'd be a shit mother!