I always thought I'd have two or three children like my parents, aunts, uncles, grandparents etc. I had my baby at 28 (a traumatic experience, but not a factor in my point) and after she came home, I really wished I hadn't had her.
My parents are emotionally cold and should not have had me or my brother if it meant they were pressured by family and wider society to have us. They didn't really equip my brother and I with the emotional requirements of having our own families. I really did a bad job in DD's early years. My DH had to step in and basically provide her emotional development in my stead. I didn't realise at the time, but my thoughts around being a mother was a factor in my breakdown 18 months ago. That and my parents' emotional coldness as well as work stress. It all built up.
It is only in the last year that my now 13 yo and I are actually bonding. I've had therapy and getting back to who I was. I am not a naturally maternal person, I know that now, but love DD to death. We are in a much better place than two years plus ago. Society, family and friends all put this idea in my head all those years ago that I should have children, and I felt that pressure. If I had been strong enough, I would have told them all to do one.
I have an "aunt" (family friend) in her 70s who never married or had children. I never heard my mum (who kept on at me having babies) criticise her decisions, and they are best friends!
PS: after having DD my DH wanted another but I emphatically said no. I'm now in my early 40s and so I thought I was "in the clear" until DH's friend's partner found out she was pregnant and she's a few years older than me. I have again said, no to any suggestion we try again. I made a decision, which was a mistake, and I am going to spend the rest of my life doing my best to make it up to the child we have, who is actually totally awesome, and a huge credit to her Dad whom I love so much.